chore: align workflow YAML delta with main for #427

[mpaulosky]

Align workflow YAML files with main to remove yamllint failures from PR #427's changed-file lint scope.\n\nThis keeps behavior intact while unblocking required status checks.

[github-actions]

🏗️ PR Added to Squad Triage Queue

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• A squad:member label will be added after triage

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[Copilot]

Pull request overview

Aligns GitHub Actions workflow YAML with main to eliminate yamllint failures in the changed-file lint scope (unblocking required status checks) while keeping workflow behavior effectively the same.

Changes:

• Standardized GitVersion action pins in Squad release/promote workflows from v4.6.0 to v4.5.0.
• Removed an extraneous comment line from the YAML lint workflow config.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
.github/workflows/squad-release.yml	Pins GitVersion setup/execute actions to v4.5.0 for parity with main.
.github/workflows/squad-promote.yml	Pins GitVersion setup/execute actions to v4.5.0 for parity with main.
.github/workflows/squad-milestone-release.yml	Pins GitVersion setup/execute actions to v4.5.0 for parity with main.
.github/workflows/squad-insider-release.yml	Pins GitVersion setup/execute actions to v4.5.0 for parity with main.
.github/workflows/lint-yaml.yml	Removes a stray comment line at the end of the workflow file.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.73%. Comparing base (377ecb2) to head (2102bc6).
⚠️ Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #440   +/-   ##
=======================================
  Coverage   76.73%   76.73%           
=======================================
  Files          71       71           
  Lines        1775     1775           
  Branches      214      214           
=======================================
  Hits         1362     1362           
  Misses        336      336           
  Partials       77       77           

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