Update greetings.yaml

.github/workflows/greetings.yaml

@@ -11,6 +11,6 @@ jobs:
     steps:
     - uses: actions/first-interaction@v1
       with:
-        repo-token: ${{ secrets.WORK }}
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
         issue-message: "Hi there! Thanks for opening this issue. We appreciate your contribution to this open-source project. We aim to respond or assign your issue as soon as possible."
         pr-message: "Welcome to Our repository.🎊 Thank you so much for taking the time to point this out."