CI: fix cache

sorry for bypassing...

Author: cometkim

.github/workflows/ci.yml

@@ -275,6 +275,7 @@ jobs:
         if: github.event_name == 'push' && github.ref == 'refs/heads/master'
         shell: bash
         run: |
+          gh extension install actions/gh-actions-cache
           gh actions-cache delete ${{ steps.compiler-build-state-key.outputs.value }} \
             -R ${{ github.repository }} \
             -B ${{ github.ref }} \