Update dependabot to commit all modified files (#826)

Author: Ryan Lymburner

.github/workflows/dependabot-make-presubmit.yml

@@ -53,6 +53,6 @@ jobs:
         run: |
           git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
           git config --local user.name "github-actions[bot]"
-          git add go.mod go.sum
+          git add -A
           git commit -m "Run make presubmit for Dependabot PR"
           git push