fix: Remove versioning-stategy from GitHub Actions Dependabot config

[Mrtenz]

Turns out package-ecosystem: 'github-actions' doesn't support versioning-strategy.

The property '#/updates/1/' contains additional properties ["versioning-strategy"] outside of the schema when none are allowed

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Note

Removes the versioning-strategy setting from the github-actions Dependabot config.

• Dependabot Config:
  • Remove versioning-strategy from updates entry for package-ecosystem: github-actions.

^{Written by Cursor Bugbot for commit 6c8ef3e. This will update automatically on new commits. Configure here.}