chore: digest and meta should have json ending

Author: lotyp

.github/workflows/build.yml

@@ -82,7 +82,7 @@ jobs:
       - name: 📤 Upload meta bake definition
         uses: actions/upload-artifact@v4
         with:
-          name: bake-meta-${{ env.PLATFORM_CACHE_TAG }}
+          name: bake-meta-${{ env.PLATFORM_CACHE_TAG }}.json
           path: /tmp/bake-meta-*.json
           if-no-files-found: error
           retention-days: 1
@@ -134,7 +134,7 @@ jobs:
       - name: 📤 Upload digest
         uses: actions/upload-artifact@v4
         with:
-          name: digests-${{ env.PLATFORM_CACHE_TAG }}
+          name: digests-${{ env.PLATFORM_CACHE_TAG }}.json
           path: /tmp/digests/*
           if-no-files-found: error
           retention-days: 1
@@ -156,9 +156,12 @@ jobs:
           pattern: digests-*
           path: /tmp/digests/*
 
-      - name: Print all download artifact files
+      - name: Print downloaded bake meta files
         run: |
           ls -la /tmp
+
+      - name: Print downloaded digests
+        run: |
           ls -la /tmp/digests
 
       - name: 🔑 Login to docker-hub