gateway: bump astral-sh/setup-uv from 7.6.0 to 8.0.0

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 7.6.0 to 8.0.0.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@37802ad...cec2083)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 8.0.0
  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

@@ -60,7 +60,7 @@ jobs:
         if: false
       - uses: anchore/scan-action@e1165082ffb1fe366ebaf02d8526e7c4989ea9d2  # v7.4.0
         if: false
-      - uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78  # v7.6.0
+      - uses: astral-sh/setup-uv@cec208311dfd045dd5311c1add060b2062131d57  # v8.0.0
         if: false
       - uses: aws-actions/configure-aws-credentials@8df5847569e6427dd6c4fb1cf565c83acfa8afa7  # v6.0.0
         if: false