chore(ci): update of CLA workflow (#65)

Co-authored-by: borislavr <noreply@github.com>

Author: NetcrackerCLPLCI

.github/workflows/cla.yaml

@@ -4,7 +4,7 @@ on:
   issue_comment:
     types: [created]
   pull_request_target:
-    types: [opened, closed, synchronize]
+    types: [opened]
 
 permissions:
   contents: read