fix: update the changelog action only for PR (#654)

Co-authored-by: pyansys-ci-bot <[email protected]>

Author: Revathyvenugopal162

.github/workflows/ci_cd.yml

@@ -46,6 +46,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: ansys/actions/doc-changelog@v8
+      if: ${{ github.event_name == 'pull_request' }}
       with:
         token: ${{ secrets.PYANSYS_CI_BOT_TOKEN }}
         use-conventional-commits: true

doc/changelog.d/654.fixed.md

@@ -0,0 +1 @@
+update the changelog action only for PR