ci: Fix close-master-prs action

.github/workflows/close-master-prs.yaml

@@ -5,14 +5,15 @@ on:
     types: [opened, reopened, synchronize]
     branches:
       - master
+  workflow_dispatch:
 
 jobs:
   close:
     runs-on: ubuntu-latest
     steps:
-      - name: Check if PR author is an org member and PR does not have no-close label
+      - name: Check and close
         env:
-          GITHUB_TOKEN: ${{ secrets.FLATHUBBOT_TOKEN }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           ORG_NAME: ${{ github.repository_owner }}
           PR_AUTHOR: ${{ github.event.pull_request.user.login }}
         run: |