add key

Author: vomba

.github/workflows/buid-vm-image-manual.yml

@@ -32,8 +32,8 @@ jobs:
       - uses: actions/cache@v4
         name: packer cache
         with:
-          path:
-            ~/.cache
+          path: ~/.cache
+          key: ${{ env.version }}-packer-cache-${{ hashFiles('**/template.json') }}
 
       - name: Enable KVM
         run: |