ci: update workflow

Author: initdc

.github/workflows/main.yml

@@ -1,20 +1,28 @@
 name: Ruby
 
 on:
+  workflow_dispatch:
   push:
     branches:
-      - main
+      - master
+      - dev
+
 
   pull_request:
 
+concurrency: 
+  group: ${{ github.sha }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ubuntu-latest
     name: Ruby ${{ matrix.ruby }}
     strategy:
       matrix:
         ruby:
-          - '3.2.2'
+          - '2.7.0'
+          - '3.0.0'
 
     steps:
     - uses: actions/checkout@v3
@@ -24,4 +32,4 @@ jobs:
         ruby-version: ${{ matrix.ruby }}
         bundler-cache: true
     - name: Run the default task
-      run: bundle exec rake
+      run: bundle exec rake