Update browserslist and caniuse-lite packages weekly

[jeremywiebe]

Summary:

This PR introduces a new Github Action that will run weekly (on Monday's at 7:30 am UTC - which maps to somewhere in the night in North America).

We will still need to manually approve and land these PRs to merge the changes (#security). Also, if we do not land the PR before this action runs again, the PR will simply be updated.

Issue: "none"

Test plan:

We can run this action manually to test. Upon running it, a new PR with the title 'chore: update browserslist' should appear.

[khan-actions-bot]

Gerald

Required Reviewers

• @Khan/perseus for changes to .github/workflows/maintenance.yml

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Don't want to be involved in this pull request? Comment #removeme and we won't notify you of further changes.

[github-actions]

Size Change: +856 B (+0.1%)

Total Size: 854 kB

Filename	Size	Change
packages/kas/dist/es/index.js	38.2 kB	+1 B (0%)
packages/kmath/dist/es/index.js	4.27 kB	+1 B (+0.02%)
packages/perseus-editor/dist/es/index.js	273 kB	+798 B (+0.29%)
packages/perseus/dist/es/index.js	414 kB	+58 B (+0.01%)
packages/pure-markdown/dist/es/index.js	3.67 kB	-2 B (-0.05%)

ℹ️ View Unchanged

Filename	Size
packages/math-input/dist/es/index.js	80.8 kB
packages/math-input/dist/es/strings.js	1.73 kB
packages/perseus-core/dist/es/index.js	1.48 kB
packages/perseus-linter/dist/es/index.js	21.6 kB
packages/perseus/dist/es/strings.js	3.21 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 70.95%. Comparing base (147ab04) to head (6ec698d).
Report is 13 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1413      +/-   ##
==========================================
+ Coverage   69.71%   70.95%   +1.23%     
==========================================
  Files         505      508       +3     
  Lines      105131   105681     +550     
  Branches     7590    10820    +3230     
==========================================
+ Hits        73293    74982    +1689     
+ Misses      31662    30699     -963     
+ Partials      176        0     -176     

see 182 files with indirect coverage changes

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[github-actions]

npm Snapshot: Published

Good news!! We've packaged up the latest commit from this PR (6ec698d) and published it to npm. You
can install it using the tag PR1413.

Example:

yarn add @khanacademy/perseus@PR1413

If you are working in Khan Academy's webapp, you can run:

./dev/tools/bump_perseus_version.sh -t PR1413

[benchristel]

Very cool. LGTM!

[somewhatabstract]

This looks good to me. I have some suggestions inline.

Do we need to do anything with Changesets to make sure the changesets action is happy with this generated PR?