fix: update release script to build on tag push rather than merge to release branch

Author: zippy

.github/workflows/release-webhapps.yaml

@@ -1,8 +1,10 @@
 name: 'release-webhapp'
 on:
   push:
-    branches:
-      - release-webhapp
+    tags:
+      - 'happ-v[0-9]+.[0-9]+.[0-9]+'
+      - 'happ-v[0-9]+.[0-9]+.[0-9]+-[a-z]+'
+      - 'happ-v[0-9]+.[0-9]+.[0-9]+-[a-z]+.[0-9]+'
 
 jobs:
   publish-happ:
@@ -43,7 +45,7 @@ jobs:
           allowUpdates: false
           artifacts: happs/happ/workdir/acorn.webhapp,happs/happ/workdir/acorn.happ
           body: 'See assets below to download and install this version.'
-          name: v${{ steps.version.outputs.APP_VERSION }}-alpha
-          tag: v${{ steps.version.outputs.APP_VERSION }}-alpha
+          name: Acorn hApp v${{ steps.version.outputs.APP_VERSION }}
+          tag: happ-v${{ steps.version.outputs.APP_VERSION }}
           prerelease: true
           draft: true