Don't run CI on ready_for_review (#17)

Author: fboemer

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
-    types: [opened, reopened, synchronize, ready_for_review]
+    types: [opened, reopened, synchronize]
 # Pushing changes to PR stops currently-running CI
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}