.github/workflows/main.yml in mocktail-1.0.0 vs .github/workflows/main.yml in mocktail-1.1.0

@@ -5,10 +5,10 @@
 jobs:
   build:
     strategy:
       matrix:
         os: [ ubuntu-latest ]
-        ruby-version: [3.0.1]
+        ruby-version: ['3.0', '3.1']
 
     runs-on: ${{ matrix.os }}
 
     steps:
     - uses: actions/checkout@v2