Require more jobs in merge queue (#570)

To re-enable the merge queue, this change adds merge_group to several
jobs.

original: line/line-bot-sdk-java#1592

Author: Yang-33

.github/workflows/generate-code.yml

@@ -1,11 +1,10 @@
 name: Generate code and open pull request
 
 on:
-  workflow_dispatch:
-  pull_request:
   push:
-    branches:
-      - master
+  pull_request:
+  merge_group:
+  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/go.yml

@@ -1,11 +1,10 @@
-name: Go
+name: Go Test
 
 on:
   push:
-    branches: [ master ]
   pull_request:
-    branches: [ master ]
   merge_group:
+  workflow_dispatch:
 
 jobs: