updated workflow to use the new version

Author: CsB-Polymesh

.github/workflows/auth-ff-merge.yml

@@ -18,15 +18,8 @@ jobs:
       pull-requests: write
       issues: write
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-          # For PR events: checks out the PR merge commit
-          # For comment events: fetches PR head using the PR number
-          ref: ${{ github.event.pull_request.head.sha || format('refs/pull/{0}/head', github.event.issue.number) }}
       - name: Polymesh Action - Auth and Fast-Forward
-        uses: PolymeshAssociation/polymesh-action-public@v1.1.4
+        uses: PolymeshAssociation/polymesh-action-public@v2.0.1
         with:
           allowed-signers: ${{ vars.MIDDLEWARE_ALLOWED_SIGNERS }}
           github-token: ${{ secrets.GITHUB_TOKEN }}