ci: scope bump_uv_lock change detection to uv.lock

[arham766]

What does this PR do?

Type of change: Bug fix

The torch-override step rewrites pyproject.toml via toml.load/toml.dump, which drops comments and reformats the file, so the unscoped git diff --quiet was always dirty and changed=false unreachable. In a week where uv lock --upgrade produces no changes, the create-pull-request step stages nothing and git commit exits 1, failing the scheduled run instead of no-oping. Scoping the diff to uv.lock restores the intended detection.

Usage

N/A — CI workflow configuration change.

Testing

Reproduced the failure locally by executing the workflow's steps in a clean checkout: after the toml mutation, unscoped git diff --quiet exits 1 with uv.lock byte-identical, and git add uv.lock && git commit -s -m x exits 1. With git diff --quiet -- uv.lock, the no-update path correctly yields changed=false. YAML validated.

Before your PR is "Ready for review"

• Is this change backward compatible?: ✅
• If you copied code from any other sources or added a new PIP dependency, did you follow guidance in CONTRIBUTING.md: N/A
• Did you write any new necessary tests?: N/A (workflow config; validated as described above)
• Did you update Changelog?: N/A (CI-only change)
• Did you get Claude approval on this PR?: N/A (external contributor; cannot trigger /claude review)

Additional Information

Part of #1890 (item 2).

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[kevalmorabia97]

/ok to test 47724d4

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 70.21%. Comparing base (4b9225b) to head (47724d4).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1892   +/-   ##
=======================================
  Coverage   70.21%   70.21%           
=======================================
  Files         515      515           
  Lines       57244    57244           
=======================================
  Hits        40196    40196           
  Misses      17048    17048           

Flag	Coverage Δ
unit	54.90% <ø> (+0.01%)	⬆️

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