gateway: bump sbt/setup-sbt from 1.1.19 to 1.1.20 (#540)

Bumps [sbt/setup-sbt](https://github.com/sbt/setup-sbt) from 1.1.19 to 1.1.20.
- [Release notes](https://github.com/sbt/setup-sbt/releases)
- [Commits](sbt/setup-sbt@6bec67c...dd1ef7d)

---
updated-dependencies:
- dependency-name: sbt/setup-sbt
  dependency-version: 1.1.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -135,7 +135,7 @@ jobs:
         if: false
       - uses: pypa/cibuildwheel@298ed2fb2c105540f5ed055e8a6ad78d82dd3a7e  # v3.3.1
         if: false
-      - uses: sbt/setup-sbt@6bec67c98f542b9e17369bfca0ec822ac1363194  # v1.1.19
+      - uses: sbt/setup-sbt@dd1ef7d7798fab5ce802a6adab3b782817b8c2d0  # v1.1.20
         if: false
       - uses: scacap/action-surefire-report@5609ce4db72c09db044803b344a8968fd1f315da  # v1.9.1
         if: false