Update dependabot-auto-merge.yml

Author: lorisleiva

.github/workflows/dependabot-auto-merge.yml

@@ -11,7 +11,7 @@ jobs:
     if: github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'codama-idl/codama'
     steps:
       - name: Enable auto-merge
-        run: gh pr merge --auto --merge "$PR_URL"
+        run: gh pr merge --auto --squash "$PR_URL"
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}