chore: bump julia-actions/julia-downgrade-compat from 2.1 to 2.2

Bumps [julia-actions/julia-downgrade-compat](https://github.com/julia-actions/julia-downgrade-compat) from 2.1 to 2.2.
- [Release notes](https://github.com/julia-actions/julia-downgrade-compat/releases)
- [Changelog](https://github.com/julia-actions/julia-downgrade-compat/blob/main/devdocs/release.md)
- [Commits](julia-actions/julia-downgrade-compat@v2.1...v2.2)

---
updated-dependencies:
- dependency-name: julia-actions/julia-downgrade-compat
  dependency-version: '2.2'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/CommonCI.yml

@@ -63,7 +63,7 @@ jobs:
         with:
           cache-name: julia-cache;workflow=${{ inputs.julia_version }}-${{ inputs.os }}-${{ github.event_name }}-${{ inputs.project }}-${{ inputs.downgrade_testing }}-${{ inputs.local_dependencies }}-${{ inputs.local_test_dependencies }}-${{ inputs.test_args }}
 
-      - uses: julia-actions/julia-downgrade-compat@v2.1
+      - uses: julia-actions/julia-downgrade-compat@v2.2
         if: ${{ inputs.downgrade_testing }}
         with:
           mode: forcedeps