gateway: bump scala-steward-org/scala-steward-action

Bumps [scala-steward-org/scala-steward-action](https://github.com/scala-steward-org/scala-steward-action) from 2.77.0 to 2.78.0.
- [Release notes](https://github.com/scala-steward-org/scala-steward-action/releases)
- [Commits](scala-steward-org/scala-steward-action@53d486a...f60ccd1)

---
updated-dependencies:
- dependency-name: scala-steward-org/scala-steward-action
  dependency-version: 2.78.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -123,7 +123,7 @@ jobs:
         if: false
       - uses: scacap/action-surefire-report@5609ce4db72c09db044803b344a8968fd1f315da  # v1.9.1
         if: false
-      - uses: scala-steward-org/scala-steward-action@53d486a68877f4a6d1e110e8058fe21e593db356  # v2.77.0
+      - uses: scala-steward-org/scala-steward-action@f60ccd18bc9d8083e6809d9dc3db4a69a71d856c  # v2.78.0
         if: false
       - uses: scalacenter/sbt-dependency-submission@64084844d2b0a9b6c3765f33acde2fbe3f5ae7d3  # v3.1.0
         if: false