Change branch name (#3)

* Change branch name

* Add workflow_dispatch

Author: nakamura-to

.github/workflows/build.yml

@@ -3,9 +3,10 @@ name: Build
 on:
   push:
     branches:
-      - master
+      - main
     pull_request:
-      - master
+      - main
+  workflow_dispatch:
 
 jobs:
   build:

.github/workflows/release-drafter.yml

@@ -3,7 +3,8 @@ name: Release Drafter
 on:
   push:
     branches:
-      - master
+      - main
+  workflow_dispatch:
 
 jobs:
   update_release_draft: