Update pr-issue-validator.yaml

Author: prakarsh-dt

.github/workflows/pr-issue-validator.yaml

@@ -28,7 +28,7 @@ jobs:
 
     - name: Validate Issue Reference
       env:
-        GITHUB_TOKEN: ${{ secrets.GH_ACTIONS_ISSUES_PR_TOKEN }}
+        GITHUB_TOKEN: ${{ github.token }}
         PR_BODY: ${{ github.event.pull_request.body }}
         url: ${{ github.event.pull_request.url }}
         PRNUM: ${{ github.event.pull_request.number }}