gateway: bump astral-sh/setup-uv from 6.7.0 to 7.1.2

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 6.7.0 to 7.1.2.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@b75a909...8585678)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 7.1.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/dummy.yml

@@ -19,7 +19,7 @@ jobs:
         if: false
       - uses: ana06/get-changed-files@25f79e676e7ea1868813e21465014798211fad8c  # v2.3.0
         if: false
-      - uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4  # v6.7.0
+      - uses: astral-sh/setup-uv@85856786d1ce8acfbcc2f13a5f3fbd6b938f9f41  # v7.1.2
         if: false
       - uses: dorny/test-reporter@dc3a92680fcc15842eef52e8c4606ea7ce6bd3f3  # v2.1.1
         if: false