amend to global cache

.github/workflows/ci-mysql-client-tests.yaml

@@ -11,7 +11,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  mysql_client_integrations_job:
+  mysql_client_integrations:
     runs-on: ubuntu-22.04
     timeout-minutes: 45
     steps:
@@ -33,13 +33,18 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
+      - name: Ensure cache directory exists
+        run: |
+          sudo mkdir -p /mnt/.buildx-cache
+          sudo chown $USER:$USER /mnt/.buildx-cache
+
       - name: Cache Docker layers
         uses: actions/cache@v3
         with:
           path: /mnt/.buildx-cache
-          key: ${{ runner.os }}-docker-${{ github.ref }}
+          key: ${{ runner.os }}-docker-mysql-client-integrations
           restore-keys: |
-            ${{ runner.os }}-docker-
+            ${{ runner.os }}-docker
 
       - name: Build MySQL test image
         uses: docker/build-push-action@v6
@@ -50,5 +55,6 @@ jobs:
           load: true
           cache-from: type=local,src=/mnt/.buildx-cache
           cache-to: type=local,dest=/mnt/.buildx-cache
+
       - name: Test MySQL client integrations
         run: docker run --rm mysql-client-tests:latest