Update pytest requirement from <8.1 to <8.2 (#261)

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...8.1.2)

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

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

test-requirements.txt

@@ -10,4 +10,4 @@ python-glanceclient
 testtools
 python-dateutil
 boto3
-pytest<8.1
+pytest<8.2