Update publish.yml

Author: yebai

.github/workflows/publish.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
       - master
+      - backport-v0.*
   workflow_dispatch: # manual trigger for testing
 
 jobs:
@@ -99,4 +100,4 @@ jobs:
         with:
           branch: gh-pages
           folder: _site
-          clean: false
+          clean: false