[🔥AUDIT🔥] Add note for how to use npm snapshot in webapp

[jeremywiebe]

Summary:

Today we note how to use the npm snapshot generally, but most folks are integrating their changes into webapp today so I'm adding a note for how to use the script in webapp.

Issue: "none"

Test plan:

[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/perseus for changes to .github/workflows/node-ci.yml

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[github-actions]

Size Change: +900 B (0%)

Total Size: 815 kB

Filename	Size	Change
packages/math-input/dist/es/index.js	79.9 kB	+164 B (0%)
packages/perseus/dist/es/index.js	391 kB	+736 B (0%)

ℹ️ View Unchanged

Filename	Size
packages/kas/dist/es/index.js	38.1 kB
packages/kmath/dist/es/index.js	4.27 kB
packages/perseus-core/dist/es/index.js	908 B
packages/perseus-editor/dist/es/index.js	263 kB
packages/perseus-error/dist/es/index.js	878 B
packages/perseus-linter/dist/es/index.js	21.8 kB
packages/pure-markdown/dist/es/index.js	3.77 kB
packages/simple-markdown/dist/es/index.js	12.4 kB

_{compressed-size-action}

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.62%. Comparing base (e991bf9) to head (f9ee87b).
Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #999      +/-   ##
==========================================
+ Coverage   63.70%   65.62%   +1.91%     
==========================================
  Files         425      428       +3     
  Lines       96439    96584     +145     
  Branches     6298     9023    +2725     
==========================================
+ Hits        61441    63383    +1942     
+ Misses      34998    33201    -1797     

see 80 files with indirect coverage changes

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[github-actions]

npm Snapshot: NOT Published

Oh noes!! We couldn't find any changesets in this PR (f9ee87b). As a result, we did not
publish an npm snapshot for you.