chore: Update GHA dep: Bump astral-sh/setup-uv from 6.7.0 to 6.8.0

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@b75a909...d0cc045)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 6.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/zizmor.yml

@@ -23,7 +23,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v6.7.0
+        uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
 
       - name: Run zizmor 🌈
         run: uvx zizmor --format=sarif . > results.sarif