ci(workflows): [dependabot-auto] sign lockfile fix commit

Signed-off-by: Lexus Drumgold <unicornware@flexdevelopment.llc>

Author: unicornware

.github/workflows/dependabot-auto.yml

@@ -84,7 +84,7 @@ jobs:
         run: |
           git add yarn.lock
           git status
-          git diff-index --quiet HEAD || git commit -m "$COMMIT_MESSAGE" && git push -f
+          git diff-index --quiet HEAD || git commit -s -m "$COMMIT_MESSAGE" && git push -f
         env:
           GIT_AUTHOR_EMAIL: ${{ steps.gpg-import.outputs.email }}
           GIT_AUTHOR_NAME: ${{ steps.gpg-import.outputs.name }}