Chore(deps): Update pytest-cov requirement from <7 to <8

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@v1.0...v7.0.0)

---
updated-dependencies:
- dependency-name: pytest-cov
  dependency-version: 7.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -143,7 +143,7 @@ optional-dependencies.release = [
 optional-dependencies.test = [
   "cratedb-toolkit[testing]",
   "pytest<9",
-  "pytest-cov<7",
+  "pytest-cov<8",
   "pytest-mock<4",
 ]
 optional-dependencies.tikray = [