build(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]

Browser/dev-requirements.txt

@@ -23,5 +23,5 @@ robotframework-archivelibrary >= 0.4.3
 uv >= 0.12.5
 build >= 1.5.0
 robotframework-ghareports >= 1.0.0
-types-PyYAML >= 6.0.12.20260724
+types-PyYAML >= 6.0.12.20260815
 requests >= 2.34.2