Always write to cache

.gitea/workflows/build-and-copy.yaml

@@ -19,7 +19,9 @@ jobs:
         uses: actions/cache@v4
         with:
           path: .cache
-          key: cache-eleventy-build
+          key: cache-eleventy-build-${{ gitea.run_id }}
+          restore-keys: |
+            cache-eleventy-build
       - name: Build eleventy
         run: npm run build
         env: