chore: Update GHA dep: Bump astral-sh/setup-uv from 6.0.1 to 6.3.1

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 6.0.1 to 6.3.1.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@6b9c606...bd01e18)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 6.3.1
  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@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6.0.1
+        uses: astral-sh/setup-uv@bd01e18f51369d5a26f1651c3cb451d3417e3bba # v6.3.1
 
       - name: Run zizmor 🌈
         run: uvx zizmor --format=sarif . > results.sarif