chore(deps): update chainguard-dev/actions digest to 7b18ea9

Author: renovate[bot]

.github/workflows/depup.yml

@@ -25,7 +25,7 @@ jobs:
       # Configure signed commits
       # https://www.chainguard.dev/unchained/keyless-git-commit-signing-with-gitsign-and-github-actions
       # https://github.com/chainguard-dev/actions/commits/main/setup-gitsign
-      - uses: chainguard-dev/actions/setup-gitsign@141bf225e9c19c34304ee9d06e9be9c44a6d8765 # main branch as of 2024-12-27
+      - uses: chainguard-dev/actions/setup-gitsign@7b18ea9960f945cabf19a84752e580829347f4ed # main branch as of 2024-12-27
 
       - name: Create Pull Request
         uses: peter-evans/create-pull-request@271a8d0340265f705b14b6d32b9829c1cb33d45e # v7.0.8