caching is broken on mac due to github actions issue.

Author: camila314

action.yml

@@ -153,6 +153,7 @@ runs:
       if: inputs.ccache-variant != ''
 
     - name: Setup CPM Cache
+      if: steps.platform.outputs.id != 'mac' # TODO: Restore after https://github.com/actions/runner/issues/449 is fixed.
       uses: actions/cache@v4
       with:
         path: ${{ github.workspace }}/cpm-cache