chore(deps): bump astral-sh/setup-uv from 4 to 5

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 4 to 5.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v4...v5)

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

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

.github/workflows/backend-test.yml

@@ -48,7 +48,7 @@ jobs:
       - uses: oven-sh/setup-bun@v2
         with:
           bun-version: 1.1.43
-      - uses: astral-sh/setup-uv@v4
+      - uses: astral-sh/setup-uv@v5
         with:
           version: "0.4.18"
       - uses: actions-rust-lang/setup-rust-toolchain@v1