Update pytest requirement from <8.1.0,>=6.2.4 to >=6.2.4,<8.2.0

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@6.2.4...8.1.1)

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

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

pyproject.toml

@@ -34,7 +34,7 @@ cluster = "sourmash_plugin_branchwater:Branchwater_Cluster"
 
 [project.optional-dependencies]
 test = [
-  "pytest>=6.2.4,<8.1.0",
+  "pytest>=6.2.4,<8.2.0",
   "pytest-cov>=2.12,<5.0",
   "pytest-xdist",
   "pandas",