chore: tweak github actions for v11 branch

Author: kazupon

.github/workflows/ci.yml

@@ -3,10 +3,10 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - v11
   pull_request:
     branches:
-      - master
+      - v11
 permissions:
   contents: read
 env:

.github/workflows/nightly-release.yml

@@ -7,7 +7,7 @@ on:
       - '!**'
   pull_request:
     branches:
-      - master
+      - v11
 
 jobs:
   release:

.github/workflows/release.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Commit changelog
         uses: stefanzweifel/git-auto-commit-action@v5
         with:
-          branch: master
+          branch: v11
           file_pattern: '*.md'
           commit_message: 'chore: sync changelog'