Fix iframe color-scheme CSS

[slorber]

Report fix of @lex111 in Infima: facebook/docusaurus#5223

The behavior of color-scheme for iframes look a bit weird. Without "auto" it seems to apply the value of the parent at the moment the iframe loads (leading to potentially a bad iframe background), and then does not update on parent color-scheme changes. Auto seems to "track" better the color-scheme changes of the parent.

[github-actions]

Dist CSS Diff

diff --git a/packages/core/dist/css/default/default.css b/packages/core/dist-branch/css/default/default.css
index 291daa5..03db51e 100644
--- a/packages/core/dist/css/default/default.css
+++ b/packages/core/dist-branch/css/default/default.css
@@ -397,6 +397,10 @@ body {
   word-wrap: break-word;
 }
 
+iframe {
+  color-scheme: auto;
+}
+
 /* Layout */
 
 /**

[github-actions]

Size Change: +236 B (0%)

Total Size: 580 kB

Filename	Size	Change
./packages/core/dist/css/default-dark/default-dark-rtl.css	84.2 kB	+34 B (0%)
./packages/core/dist/css/default-dark/default-dark-rtl.min.css	59.1 kB	+25 B (0%)
./packages/core/dist/css/default-dark/default-dark.css	84.2 kB	+34 B (0%)
./packages/core/dist/css/default-dark/default-dark.min.css	59 kB	+25 B (0%)
./packages/core/dist/css/default/default-rtl.css	82.6 kB	+34 B (0%)
./packages/core/dist/css/default/default-rtl.min.css	57.9 kB	+25 B (0%)
./packages/core/dist/css/default/default.css	82.6 kB	+34 B (0%)
./packages/core/dist/css/default/default.min.css	57.9 kB	+25 B (0%)

ℹ️ View Unchanged

Filename	Size
./packages/core/dist/js/alerts.js	409 B
./packages/core/dist/js/alerts.min.js	409 B
./packages/core/dist/js/button-groups.js	267 B
./packages/core/dist/js/button-groups.min.js	267 B
./packages/core/dist/js/dropdowns.js	1.01 kB
./packages/core/dist/js/dropdowns.min.js	1.01 kB
./packages/core/dist/js/menu.js	1.94 kB
./packages/core/dist/js/menu.min.js	1.94 kB
./packages/core/dist/js/navbar.js	1.08 kB
./packages/core/dist/js/navbar.min.js	1.08 kB
./packages/core/dist/js/pills.js	270 B
./packages/core/dist/js/pills.min.js	270 B
./packages/core/dist/js/radio-behavior.js	705 B
./packages/core/dist/js/radio-behavior.min.js	705 B
./packages/core/dist/js/tabs.js	267 B
./packages/core/dist/js/tabs.min.js	267 B

_{compressed-size-action}

[netlify]

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