Update python-keycloak requirement from <4.0.0,>=3.9.1 to >=3.9.1,<5.0.0

Updates the requirements on [python-keycloak](https://github.com/marcospereirampj/python-keycloak) to permit the latest version.
- [Changelog](https://github.com/marcospereirampj/python-keycloak/blob/master/CHANGELOG.md)
- [Commits](marcospereirampj/python-keycloak@v3.9.1...v4.0.0)

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

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

pyproject.toml

@@ -38,7 +38,7 @@ dependencies = [
 tests = [
     "pytest==8.2.0",
     "coverage==7.5.1",
-    "python-keycloak>=3.9.1,<4.0.0",
+    "python-keycloak>=3.9.1,<5.0.0",
 ]
 
 doc = [