fix(workflows): rename debug image cache

Signed-off-by: Gaius <gaius.qi@gmail.com>

.github/workflows/docker.yml

@@ -142,10 +142,10 @@ jobs:
       - name: Cache Docker layers
         uses: actions/cache@v4
         with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          path: /tmp/.buildx-cache-debug
+          key: ${{ runner.os }}-buildx-debug-${{ github.sha }}
           restore-keys: |
-            ${{ runner.os }}-buildx-
+            ${{ runner.os }}-buildx-debug-
 
       - name: Login Docker Hub
         uses: docker/login-action@v3
@@ -195,8 +195,8 @@ jobs:
 
       - name: Move cache
         run: |
-          rm -rf /tmp/.buildx-cache
-          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+          rm -rf /tmp/.buildx-cache-debug
+          mv /tmp/.buildx-cache-new-debug /tmp/.buildx-cache-debug
 
   push_dfinit_image_to_registry:
     name: Push Dfinit Image