Update pytz requirement from ~=2022.4 to ~=2022.5

Updates the requirements on [pytz](https://github.com/stub42/pytz) to permit the latest version.
- [Release notes](https://github.com/stub42/pytz/releases)
- [Commits](stub42/pytz@release_2022.4...release_2022.5)

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

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

requirements.txt

@@ -112,7 +112,7 @@ pytest-mock~=3.10.0
 pytest-rerunfailures~=10.2
 pytest-xdist~=2.5.0
 python-dateutil~=2.8.2
-pytz~=2022.4
+pytz~=2022.5
 PyVISA~=1.12.0
 PyVISA-sim~=0.5.1
 pywin32==304; sys_platform == 'win32'