modify check_model_pattern_changes.yml

Author: wgzintel

.github/workflows/check_model_pattern_changes.yml

@@ -7,10 +7,9 @@ env:
   LLM_BENCH_PYPATH: llm_bench/python
 
 on:
-  push:
-    branches: [ "master" ]
+  pull_request:
     paths:
-      - llm_bench/python/requirements.txt
+      - 'llm_bench/python/requirements.txt'
       - .github/workflows/check_model_pattern_changes.yml
 
 permissions: read-all  # Required by https://github.com/ossf/scorecard/blob/e23b8ad91fd6a64a0a971ca4fc0a4d1650725615/docs/checks.md#token-permissions