Build(deps): Bump astral-sh/setup-uv from 3 to 4

Bumps [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) from 3 to 4.
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@v3...v4)

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

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

Author: dependabot[bot]

.github/workflows/tox.yml

@@ -115,7 +115,7 @@ jobs:
           submodules: recursive
           fetch-depth: 0
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@v4
       - name: Load test data cache
         uses: actions/cache@v4
         id: stanford-crn
@@ -167,7 +167,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@v4
       - name: Show tox config
         run: uvx tox c
       - name: Show tox config (this call)