Add security scanning Github Action

Author: sachinh-amazon

.github/workflows/gitsecrets.yml

@@ -1,6 +1,11 @@
 name: GitSecretsScan
 
-on: [push, pull_request]
+on:
+  pull_request:
+    branches:
+      - main
+      - '*.*'
+    types: [opened, reopened, synchronize]
 
 jobs:
   git-secret-check: