.github/workflows/run_tests.yaml in prop_check-0.17.0 vs .github/workflows/run_tests.yaml in prop_check-0.18.0

@@ -1,11 +1,11 @@
 name: Ruby RSpec tests
 
 on:
   push:
-    branches: [ master ]
+    branches: [ main ]
   pull_request:
-    branches: [ master ]
+    branches: [ main ]
 
 permissions:
   contents: read
 
 jobs: