ci: disable dependabot merge workflow

Refs #7341

.github/workflows/dependabot-merge.yml

@@ -1,25 +0,0 @@
-name: Merge me!
-
-on:
-  pull_request_target:
-
-jobs:
-  merge-me:
-    name: Merge me!
-    if: github.actor == 'dependabot[bot]'
-    runs-on: ubuntu-latest
-    steps:
-      - name: 'Wait for status checks'
-        id: waitforstatuschecks
-        uses: WyriHaximus/github-action-wait-for-status@v1
-        with:
-          ignoreActions: Merge me!
-          checkInterval: 180
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      - name: Merge me!
-        if: steps.waitforstatuschecks.outputs.status == 'success'
-        uses: ahmadnassri/action-dependabot-auto-merge@v2
-        with:
-          target: minor
-          github-token: ${{ secrets.SWAGGER_BOT_GITHUB_TOKEN }}