[pip] Update simplejson requirement from ~=3.19.3 to ~=3.20.1 (#123)

Updates the requirements on [simplejson](https://github.com/simplejson/simplejson) to permit the latest version.
- [Release notes](https://github.com/simplejson/simplejson/releases)
- [Changelog](https://github.com/simplejson/simplejson/blob/master/CHANGES.txt)
- [Commits](simplejson/simplejson@v3.19.3...v3.20.1)

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

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

requirements.txt

@@ -8,5 +8,5 @@ labnode-async~=0.16.4
 prologix-gpib-async~=1.4.14
 pydantic~=2.10.6
 python-decouple~=3.8
-simplejson~=3.19.3
+simplejson~=3.20.1
 tinkerforge-async~=1.5.3