chore(deps-dev): update types-pyyaml requirement

Updates the requirements on [types-pyyaml](https://github.com/python/typeshed) to permit the latest version.
- [Commits](https://github.com/python/typeshed/commits)

---
updated-dependencies:
- dependency-name: types-pyyaml
  dependency-version: 6.0.12.20260815
  dependency-type: direct:development
...

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

Author: dependabot[bot]

pyproject.toml

@@ -49,7 +49,7 @@ dev = [
     "httpx==0.28.1",
     "ruff==0.16.3",
     "mypy>=2.3.1",
-    "types-PyYAML>=6.0.12.20260724",
+    "types-PyYAML>=6.0.12.20260815",
     "types-requests>=2.33.0.20260712",
 ]