Update codegen.yml

Author: brondani

.github/workflows/codegen.yml

@@ -6,11 +6,13 @@ on:
     paths:
       - '.github/workflows/codegen.yml'
       - 'codegen/**'
+      - 'api/*.yml'
       - '!**/*.md'
   pull_request:
     paths:
       - '.github/workflows/codegen.yml'
       - 'codegen/**'
+      - 'api/*.yml'
       - '!**/*.md'
   release:
     types: [published]