build(deps): bump actions/cache from 2 to 4 (#8467)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/platform-autgpt-deploy-prod.yml

@@ -78,7 +78,7 @@ jobs:
       uses: docker/setup-buildx-action@v3
 
     - name: Cache Docker layers
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: /tmp/.buildx-cache
         key: ${{ runner.os }}-buildx-${{ github.sha }}

.github/workflows/platform-autogpt-deploy.yaml

@@ -82,7 +82,7 @@ jobs:
       uses: docker/setup-buildx-action@v3
 
     - name: Cache Docker layers
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       with:
         path: /tmp/.buildx-cache
         key: ${{ runner.os }}-buildx-${{ github.sha }}