Use DAX_PAT in auto respond dependabot comments (#2107)

Author: jonathanKingston

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

@@ -42,4 +42,4 @@ jobs:
                   Can you draft a separate PR with any fixes that might be needed?"
               env:
                   PR_URL: ${{ github.event.pull_request.html_url }}
-                  GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+                  GH_TOKEN: ${{ secrets.DAX_PAT }}

.github/workflows/dependabot-conflict-detector.yml

@@ -14,6 +14,7 @@ jobs:
             - name: Check Dependabot PRs for conflicts
               uses: actions/github-script@v7
               with:
+                  github-token: ${{ secrets.DAX_PAT }}
                   script: |
                       const { data: pulls } = await github.rest.pulls.list({
                         owner: context.repo.owner,