workflows: bump cla from v2.3.2 to v2.4.0 (#179)

to move CLA/DCO bot name into subscript at end of comment.

https://github.com/contributor-assistant/github-action/releases/tag/v2.4.0

Author: liuzengh

Diff for: .github/workflows/cla.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - name: "CLA Assistant"
         if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLA Document and I hereby sign the CLA') || github.event_name == 'pull_request_target'
-        uses: contributor-assistant/github-action@v2.3.2
+        uses: contributor-assistant/github-action@v2.4.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PERSONAL_ACCESS_TOKEN: ${{ secrets.CLA_DATABASE_ACCESS_TOKEN }}