chore(deps): bump game-ci/unity-test-runner in /.github/workflows (#535)

Bumps [game-ci/unity-test-runner](https://github.com/game-ci/unity-test-runner) from 3 to 4.
- [Release notes](https://github.com/game-ci/unity-test-runner/releases)
- [Commits](https://github.com/game-ci/unity-test-runner/compare/v3...v4)

---
updated-dependencies:
- dependency-name: game-ci/unity-test-runner
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/gameci.yml

@@ -120,7 +120,7 @@ jobs:
           key: Library-${{ matrix.unity_version }}-${{ matrix.sdk }}
           restore-keys: Library-
 
-      - uses: game-ci/unity-test-runner@v3
+      - uses: game-ci/unity-test-runner@v4
         id: gameci
         continue-on-error: ${{ steps.setup.outputs.can_fail == 'true' }}
         if: ${{ steps.setup.outputs.should_test == 'true' }}