ci: bump astral-sh/setup-uv from 5 to 7

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 5 to 7.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@v5...v7)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -57,7 +57,7 @@ jobs:
       - uses: Swatinem/rust-cache@v2
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@v7
 
       - name: Install the haybarn unittest runner
         # Only `haybarn-unittest` is installed as a tool; `haybarn-cli` (used to