GH Actions: only upload ubuntu-22.04 to release

Author: mmsinclair

.github/workflows/build.yml

@@ -59,6 +59,6 @@ jobs:
 
       - name: Upload to release based on tag name
         uses: softprops/action-gh-release@v1
-        if: github.event_name == 'release'
+        if: github.event_name == 'release' && matrix.os == 'ubuntu-22.04'
         with:
           files: build/*