De-quote 3.1

Author: petergoldstein

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
        include:
          # Edge Rails (7.1) builds >= 2.7
-         - ruby: '3.1'
+         - ruby: 3.1
            allow_failure: true
            env:
              RAILS_VERSION: 'main'
@@ -42,7 +42,7 @@ jobs:
              RAILS_VERSION: '~> 7.0.0'
 
          # Rails 6.1 builds >= 2.5
-         - ruby: '3.1'
+         - ruby: 3.1
            env:
              RAILS_VERSION: '~> 6.1.0'
          - ruby: '3.0'