build(deps): bump pyrad from 2.4 to 2.5.2

Bumps [pyrad](https://github.com/pyradius/pyrad) from 2.4 to 2.5.2.
- [Release notes](https://github.com/pyradius/pyrad/releases)
- [Changelog](https://github.com/pyradius/pyrad/blob/master/CHANGES.rst)
- [Commits](pyradius/pyrad@2.4...2.5.2)

---
updated-dependencies:
- dependency-name: pyrad
  dependency-version: 2.5.2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -5,4 +5,4 @@ netaddr==1.3.0
 requests==2.32.5
 six==1.17.0
 urllib3==2.6.3
-pyrad==2.4
+pyrad==2.5.2