build(deps): bump chainguard-dev/actions in the actions group

Bumps the actions group with 1 update: [chainguard-dev/actions](https://github.com/chainguard-dev/actions).


Updates `chainguard-dev/actions` from 1.5.3 to 1.5.4
- [Release notes](https://github.com/chainguard-dev/actions/releases)
- [Changelog](https://github.com/chainguard-dev/actions/blob/main/.goreleaser.yml)
- [Commits](chainguard-dev/actions@6f4f4de...7b18ea9)

---
updated-dependencies:
- dependency-name: chainguard-dev/actions
  dependency-version: 1.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/regen-answers.yaml

@@ -55,7 +55,7 @@ jobs:
         echo "create_pr_update=true" >> $GITHUB_OUTPUT
 
     # Configure signed commits
-    - uses: chainguard-dev/actions/setup-gitsign@6f4f4de7549514e7b659741b30f6476f245600dd # v1.5.3
+    - uses: chainguard-dev/actions/setup-gitsign@7b18ea9960f945cabf19a84752e580829347f4ed # v1.5.4
       if: ${{ steps.check-diff.outputs.create_pr_update == 'true' }}
 
     # Based on usage in https://github.com/chainguard-dev/digestabot/blob/main/action.yml