Actions v6 cleanup

[eshattow]

Drops the trailing line comment with version. These comments are stale since this is managed by dependabot.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.68%. Comparing base (58b364c) to head (b26c580).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #623      +/-   ##
==========================================
- Coverage   85.74%   85.68%   -0.06%     
==========================================
  Files          29       29              
  Lines        3487     3487              
  Branches      602      602              
==========================================
- Hits         2990     2988       -2     
- Misses        307      308       +1     
- Partials      190      191       +1     

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[codspeed-hq]

Merging this PR will not alter performance

✅ 6 untouched benchmarks

---

_{Comparing eshattow:actions-v6 (b26c580) with main (58b364c)}

[dlech]

stale comment commit should be in a separate PR (we always do squash and merge in this repo and would be good to keep that separate)

[dlech]

In https://github.com/Bluetooth-Devices/dbus-fast/pull/621/changes, depedabot is updating some of the version comments. Perhaps instead of deleting them, we should be updating them to the correct semver tag instead of just the major version.