Add a manual workflow dispatch option for publish and specify the assets/ path for auto-triggering the workflow to cut down on publishing noise (#227)

.github/workflows/publish.yml

@@ -1,8 +1,11 @@
 name: Publish library
 
 on:
+  workflow_dispatch:
   push:
     branches: [ master ]
+    paths:
+      - 'assets/**'
 
 env:
   LIBRARY_VERSION: 1.1.${{ github.run_number }}