Update pluggy requirement from ~=1.5 to ~=1.6

Updates the requirements on [pluggy](https://github.com/pytest-dev/pluggy) to permit the latest version.
- [Changelog](https://github.com/pytest-dev/pluggy/blob/main/CHANGELOG.rst)
- [Commits](https://github.com/pytest-dev/pluggy/compare/1.5.0...1.6.0)

---
updated-dependencies:
- dependency-name: pluggy
  dependency-version: 1.6.0
  dependency-type: direct:production
...

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

requirements.txt

@@ -137,7 +137,7 @@ tzdata
 
 #typing_extensions ==4.8.0
 
-pluggy ~= 1.5
+pluggy ~= 1.6
 
 # Needed for testing, cross-platform for process and system monitoring
 psutil==7.1.0