Fix stale version comment on codespell action pin

[samuv]

Summary

• The pinned SHA for codespell-project/actions-codespell was annotated # v2, but that commit is actually tagged v2.1, not v2. zizmor's ref-version-mismatch audit flags this as a stale/misleading version comment (High confidence).
• Updated the comment to # v2.1 so it accurately reflects the tag the pinned hash points to.

Type of change

• Bug fix

Test plan

• Manual testing (describe below)

Confirmed via GitHub that commit 406322e on codespell-project/actions-codespell is tagged v2.1 (not v2), matching zizmor's finding.

Does this introduce a user-facing change?

No.

Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.00%. Comparing base (8343851) to head (f802fd6).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6360      +/-   ##
==========================================
+ Coverage   72.96%   73.00%   +0.03%     
==========================================
  Files         742      742              
  Lines       78236    78398     +162     
==========================================
+ Hits        57085    57233     +148     
+ Misses      17172    17158      -14     
- Partials     3979     4007      +28     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.