[ci]: minor optimization in react-devtools artifacts download step

[arthur-mountain]

Summary

This change introduces a minor optimization by fetching the original commit only when necessary.

It may prove especially useful for workflows triggered by workflow_dispatch, as it can help improve efficiency, particularly in large-scale projects like React.

How did you test this change?

N/A

[react-sizebot]

Comparing: 143d3e1...ec2edd7

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.js	=	6.68 kB	6.68 kB	=	1.83 kB	1.83 kB
oss-stable/react-dom/cjs/react-dom-client.production.js	=	527.72 kB	527.72 kB	=	93.07 kB	93.07 kB
oss-experimental/react-dom/cjs/react-dom.production.js	=	6.69 kB	6.69 kB	=	1.83 kB	1.83 kB
oss-experimental/react-dom/cjs/react-dom-client.production.js	=	633.34 kB	633.34 kB	=	111.25 kB	111.25 kB
facebook-www/ReactDOM-prod.classic.js	=	671.13 kB	671.13 kB	=	117.70 kB	117.70 kB
facebook-www/ReactDOM-prod.modern.js	=	661.41 kB	661.41 kB	=	116.14 kB	116.14 kB

Significant size changes

Includes any change greater than 0.2%:

Expand to show

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-experimental/react-markup/cjs/react-markup.react-server.development.js	=	537.01 kB	535.52 kB	=	96.21 kB	95.97 kB
oss-experimental/react-markup/cjs/react-markup.development.js	=	362.08 kB	360.60 kB	=	64.98 kB	64.73 kB
oss-experimental/react-markup/cjs/react-markup.react-server.production.js	=	320.33 kB	318.83 kB	=	59.73 kB	59.54 kB
oss-experimental/react-markup/cjs/react-markup.production.js	=	219.88 kB	218.38 kB	=	40.48 kB	40.29 kB
facebook-www/ReactDOMServerStreaming-dev.modern.js	=	369.48 kB	366.95 kB	=	66.42 kB	65.95 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.browser.development.js	=	392.11 kB	389.33 kB	=	69.51 kB	69.04 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.node.development.js	=	392.11 kB	389.33 kB	=	69.51 kB	69.04 kB
oss-experimental/react-dom/cjs/react-dom-server.edge.development.js	=	418.51 kB	415.50 kB	=	72.75 kB	72.18 kB
oss-experimental/react-dom/cjs/react-dom-server.browser.development.js	=	417.50 kB	414.49 kB	=	72.54 kB	71.97 kB
oss-experimental/react-dom/cjs/react-dom-server.node.development.js	=	413.42 kB	410.41 kB	=	71.92 kB	71.41 kB
facebook-www/ReactDOMServer-dev.classic.js	=	381.64 kB	378.87 kB	=	68.29 kB	67.81 kB
facebook-www/ReactDOMServer-dev.modern.js	=	378.19 kB	375.41 kB	=	67.76 kB	67.28 kB
oss-experimental/react-dom/cjs/react-dom-server.bun.development.js	=	350.01 kB	347.41 kB	=	66.45 kB	65.97 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.browser.development.js	=	365.44 kB	362.37 kB	=	66.27 kB	65.76 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.node.development.js	=	365.43 kB	362.37 kB	=	66.27 kB	65.76 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.browser.development.js	=	365.41 kB	362.34 kB	=	66.24 kB	65.74 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.node.development.js	=	365.41 kB	362.34 kB	=	66.24 kB	65.74 kB
oss-stable/react-dom/cjs/react-dom-server.node.development.js	=	378.07 kB	374.81 kB	=	67.93 kB	67.40 kB
oss-stable-semver/react-dom/cjs/react-dom-server.node.development.js	=	377.99 kB	374.73 kB	=	67.87 kB	67.35 kB
oss-stable/react-dom/cjs/react-dom-server.bun.development.js	=	325.33 kB	322.50 kB	=	63.20 kB	62.68 kB
oss-stable-semver/react-dom/cjs/react-dom-server.bun.development.js	=	325.25 kB	322.43 kB	=	63.17 kB	62.65 kB
oss-stable/react-dom/cjs/react-dom-server.edge.development.js	=	382.39 kB	379.03 kB	=	68.71 kB	68.17 kB
oss-stable-semver/react-dom/cjs/react-dom-server.edge.development.js	=	382.32 kB	378.96 kB	=	68.66 kB	68.12 kB
oss-stable/react-dom/cjs/react-dom-server.browser.development.js	=	381.61 kB	378.25 kB	=	68.57 kB	68.02 kB
oss-stable-semver/react-dom/cjs/react-dom-server.browser.development.js	=	381.54 kB	378.18 kB	=	68.52 kB	67.97 kB
oss-experimental/react-dom/cjs/react-dom-server.edge.production.js	=	266.42 kB	263.89 kB	=	47.21 kB	46.73 kB
oss-experimental/react-dom/cjs/react-dom-server.browser.production.js	=	260.47 kB	257.94 kB	=	45.07 kB	44.60 kB
oss-experimental/react-dom/cjs/react-dom-server.node.production.js	=	262.34 kB	259.74 kB	=	46.20 kB	45.75 kB
oss-experimental/react-dom/cjs/react-dom-server.bun.production.js	=	238.57 kB	235.99 kB	=	42.82 kB	42.42 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.node.production.js	=	238.03 kB	235.45 kB	=	43.42 kB	43.02 kB
oss-experimental/react-dom/cjs/react-dom-server-legacy.browser.production.js	=	232.95 kB	230.37 kB	=	41.51 kB	41.11 kB
facebook-www/ReactDOMServer-prod.classic.js	=	224.87 kB	222.29 kB	=	40.28 kB	39.88 kB
facebook-www/ReactDOMServer-prod.modern.js	=	222.18 kB	219.61 kB	=	39.96 kB	39.54 kB
oss-stable/react-dom/cjs/react-dom-server.edge.production.js	=	238.24 kB	235.47 kB	=	43.65 kB	43.15 kB
oss-stable-semver/react-dom/cjs/react-dom-server.edge.production.js	=	238.16 kB	235.39 kB	=	43.62 kB	43.12 kB
facebook-www/ReactDOMServerStreaming-prod.modern.js	=	226.44 kB	223.80 kB	=	41.53 kB	41.11 kB
oss-stable/react-dom/cjs/react-dom-server.node.production.js	=	234.80 kB	232.01 kB	=	42.66 kB	42.17 kB
oss-stable-semver/react-dom/cjs/react-dom-server.node.production.js	=	234.72 kB	231.93 kB	=	42.63 kB	42.15 kB
oss-stable/react-dom/cjs/react-dom-server.browser.production.js	=	233.03 kB	230.26 kB	=	41.71 kB	41.19 kB
oss-stable-semver/react-dom/cjs/react-dom-server.browser.production.js	=	232.96 kB	230.19 kB	=	41.69 kB	41.17 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.node.production.js	=	218.49 kB	215.69 kB	=	40.65 kB	40.21 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.node.production.js	=	218.47 kB	215.67 kB	=	40.63 kB	40.19 kB
oss-stable/react-dom/cjs/react-dom-server-legacy.browser.production.js	=	213.98 kB	211.18 kB	=	38.89 kB	38.46 kB
oss-stable-semver/react-dom/cjs/react-dom-server-legacy.browser.production.js	=	213.95 kB	211.15 kB	=	38.87 kB	38.43 kB
oss-stable/react-dom/cjs/react-dom-server.bun.production.js	=	218.27 kB	215.41 kB	=	40.08 kB	39.64 kB
oss-stable-semver/react-dom/cjs/react-dom-server.bun.production.js	=	218.19 kB	215.34 kB	=	40.05 kB	39.61 kB

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