fix: match trigger condition string (#72)

Adjust trigger condition string to custom-pr-sign-comment: "I have read
the CLA Document and I hereby accept the CLA"

.github/workflows/reusable-agreements.yaml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     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'
+        if: (github.event.comment.body == 'recheck' || github.event.comment.body == 'I have read the CLA Document and I hereby accept the CLA') || github.event_name == 'pull_request_target'
         uses: contributor-assistant/[email protected]
         env:
           GITHUB_TOKEN: ${{ secrets.GH_TOKEN }}