update CACHE_REF for release workflow

.github/workflows/release-rc.yml

@@ -31,7 +31,7 @@ jobs:
 
     - name: Build Docker Image
       run: |
-        CACHE_REF=weseek/growi-cache:3
+        CACHE_REF=weseek/growi-cache:4
         docker buildx build \
           --tag growi \
           --platform linux/amd64 \

.github/workflows/release.yml

@@ -88,7 +88,7 @@ jobs:
 
     - name: Build Docker Image
       run: |
-        CACHE_REF=weseek/growi-cache:3${{ env.SUFFIX }}
+        CACHE_REF=weseek/growi-cache:4${{ env.SUFFIX }}
         docker buildx build \
           --tag growi${{ env.SUFFIX }} \
           --build-arg flavor=${{ matrix.flavor }} \