[ci] Windows compatible script

Author: sharder996

.github/workflows/windows-macos.yml

@@ -225,6 +225,7 @@ jobs:
 
     - name: Set up CCache
       id: setup-ccache
+      shell: bash
       run: |
         # Find common base between main and HEAD to use as cache key.
         # This avoids PRs from publishing caches.