[noissue]: Update python-gnupg requirement

Updates the requirements on [python-gnupg](https://github.com/vsajip/python-gnupg) to permit the latest version.
- [Release notes](https://github.com/vsajip/python-gnupg/releases)
- [Changelog](https://github.com/vsajip/python-gnupg/blob/master/release)
- [Commits](vsajip/python-gnupg@0.5.0...0.5.3)

---
updated-dependencies:
- dependency-name: python-gnupg
  dependency-type: direct:production
...

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

requirements.txt

@@ -34,7 +34,7 @@ pulp-glue>=0.18.0,<0.29
 pygtrie>=2.5,<=2.5.0
 psycopg[binary]>=3.1.8,<=3.2.2
 pyparsing>=3.1.0,<=3.1.4
-python-gnupg>=0.5,<=0.5.2
+python-gnupg>=0.5,<=0.5.3
 PyYAML>=5.1.1,<=6.0.2
 redis>=4.3,<5.0.9
 tablib<3.6.0