Fix token consistency in workflows

- Use github.token for dependabot/fetch-metadata action in both workflows
- Ensures consistent token usage across all workflow steps
- Matches repo pattern of using github.token instead of secrets.GITHUB_TOKEN

Co-authored-by: thomasturrell <1552612+thomasturrell@users.noreply.github.com>

Author: Copilot

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

@@ -16,7 +16,7 @@ jobs:
         id: metadata
         uses: dependabot/fetch-metadata@v2
         with:
-          github-token: "${{ secrets.GITHUB_TOKEN }}"
+          github-token: "${{ github.token }}"
       - name: Approve minor and patch updates
         if: steps.metadata.outputs.update-type == 'version-update:semver-minor' || steps.metadata.outputs.update-type == 'version-update:semver-patch'
         run: |

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

@@ -15,7 +15,7 @@ jobs:
         id: metadata
         uses: dependabot/fetch-metadata@v2
         with:
-          github-token: "${{ secrets.GITHUB_TOKEN }}"
+          github-token: "${{ github.token }}"
       - name: Enable auto-merge for minor and patch updates
         if: steps.metadata.outputs.update-type == 'version-update:semver-minor' || steps.metadata.outputs.update-type == 'version-update:semver-patch'
         run: |