Bump astral-sh/setup-uv from 6 to 7 in the github-actions group

Bumps the github-actions group with 1 update: [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv).


Updates `astral-sh/setup-uv` from 6 to 7
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](https://github.com/astral-sh/setup-uv/compare/v6...v7)

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

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

.github/workflows/main.yml

@@ -32,7 +32,7 @@ jobs:
         env:
           CI: true
       - name: Install uv
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@v7
       - name: Install Python dependencies
         run: uv sync --frozen --group dev
       - name: Run backend smoke checks