build(deps-dev): update pytest-cov requirement (#338)

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@v3.0.0...v5.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -47,7 +47,7 @@ dependencies = [
 [project.optional-dependencies]
 test = [
     "pytest>=7.3.2",
-    "pytest-cov>=3.0.0,<5.0.0",
+    "pytest-cov>=3.0.0,<6.0.0",
     "pytest-pretty>=1.0.0,<2.0.0",
     "onnx>=1.13.0,<2.0.0",
 ]
@@ -79,7 +79,7 @@ docs = [
 dev = [
     # test
     "pytest>=7.3.2",
-    "pytest-cov>=3.0.0,<5.0.0",
+    "pytest-cov>=3.0.0,<6.0.0",
     "pytest-pretty>=1.0.0,<2.0.0",
     "onnx>=1.13.0,<2.0.0",
     # style