chore(deps): update dependabot/fetch-metadata action to v1.5.1 (#94)

Co-authored-by: mend-for-github-com[bot] <50673670+mend-for-github-com[bot]@users.noreply.github.com>
Co-authored-by: Fran Herrero <francisco.herrero@axa.com>

Author: mend-for-github-com[bot]

.github/workflows/dependabot-automerge.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.1.1
+        uses: dependabot/fetch-metadata@v1.5.1
         with:
           github-token: "${{ secrets.AUTOMERGE_TOKEN }}"
       - name: Approve a PR