gateway: bump astral-sh/setup-uv from 7.1.6 to 7.3.0

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 7.1.6 to 7.3.0.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@681c641...eac588a)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 7.3.0
  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

@@ -19,7 +19,7 @@ jobs:
         if: false
       - uses: ana06/get-changed-files@25f79e676e7ea1868813e21465014798211fad8c  # v2.3.0
         if: false
-      - uses: astral-sh/setup-uv@681c641aba71e4a1c380be3ab5e12ad51f415867  # v7.1.6
+      - uses: astral-sh/setup-uv@eac588ad8def6316056a12d4907a9d4d84ff7a3b  # v7.3.0
         if: false
       - uses: dorny/test-reporter@b082adf0eced0765477756c2a610396589b8c637  # v2.5.0
         if: false