fix(release): put frontend files at the root of frontend.zip

The release job zipped ./client/dist, so every archive entry carried a
client/dist/ prefix and an unzip dropped the app into a client/dist
subfolder. Zip from inside dist instead, so index.html, assets and the
bundled viya.json sit at the root of the archive.

Closes #147

.gitea/workflows/release.yaml

@@ -302,8 +302,10 @@ jobs:
         run: |
           cd sas
           cp sasjsbuild/viya.json ../client/dist/viya.json
-          cd ..
-          zip -r frontend.zip ./client/dist
+          # Zip from *inside* dist so the archive holds the frontend files at its
+          # root rather than under a client/dist/ prefix (see #147).
+          cd ../client/dist
+          zip -r ../../frontend.zip .
 
       - name: Release Typedoc
         run: |