chore(deps-dev): update pytest-cov requirement in /sdk

Updates the requirements on [pytest-cov](https://github.com/pytest-dev/pytest-cov) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pytest-cov/blob/master/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-cov@v6.0.0...v7.1.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 7.1.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

sdk/pyproject.toml

@@ -30,7 +30,7 @@ dependencies = [
 [project.optional-dependencies]
 dev = [
     "pytest>=9.0.3",
-    "pytest-cov>=6.0",
+    "pytest-cov>=7.1.0",
     "pytest-asyncio>=1.3.0",
     "mypy>=1.14",
     "mypy-protobuf>=3.6",