no infinite ci loop

Author: mattapperson

.github/workflows/sdk_generation_for_spec_change.yaml

@@ -15,14 +15,16 @@ permissions:
       set_version:
         description: optionally set a specific SDK version
         type: string
-  push:
+  pull_request:
+    types: [closed]
     branches:
-      - main
+      - main 
     paths:
       - .speakeasy/in.openapi.yaml
 
 jobs:
   generate:
+    if: github.event.pull_request.merged == true
     uses: speakeasy-api/sdk-generation-action/.github/workflows/workflow-executor.yaml@v15
     with:
       force: ${{ github.event.inputs.force }}