Update pytest requirement from <8 to <9

Updates the requirements on [pytest](https://github.com/pytest-dev/pytest) to permit the latest version.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@1.0.0b3...8.1.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -139,7 +139,7 @@ release = [
 test = [
   "cratedb-toolkit[testing]",
   "pueblo[dataframe]",
-  "pytest<8",
+  "pytest<9",
   "pytest-cov<5",
   "pytest-mock<4",
   "responses<0.25",