Bump wntrblm/nox from 2026.04.10 to 2026.08.17 in /.github/workflows

Bumps [wntrblm/nox](https://github.com/wntrblm/nox) from 2026.04.10 to 2026.08.17.
- [Release notes](https://github.com/wntrblm/nox/releases)
- [Changelog](https://github.com/wntrblm/nox/blob/main/CHANGELOG.md)
- [Commits](wntrblm/nox@2026.04.10...2026.08.17)

---
updated-dependencies:
- dependency-name: wntrblm/nox
  dependency-version: 2026.08.17
  dependency-type: direct:production
...

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

Author: dependabot[bot]

.github/workflows/tests.yaml

@@ -18,6 +18,6 @@ jobs:
           cache-dependency-glob: "uv.lock"
 
       - name: Install nox
-        uses: wntrblm/nox@2026.04.10
+        uses: wntrblm/nox@2026.08.17
 
       - run: nox