Fix test regex for proxy error message (#2307)

The test was failing due to an incorrect regex
pattern in the expected error message.
The regex has been updated to match the correct
proxy-related error message format.
This ensures the test properly validates conflicting
proxy settings and prevents false failures.

Signed-off-by: Shahaf Bahar <[email protected]>

Author: sbahar619

tests/test_resources.py

@@ -128,6 +128,6 @@ def test_proxy_conflict_raises_value_error(self, monkeypatch):
         with pytest.raises(
             ValueError,
             match="Conflicting proxy settings: client_configuration.proxy=http://not-env-proxy.com, "
-            "but the environment variable 'OPENSHIFT_PYTHON_WRAPPER_CLIENT_USE_PROXY' defines proxy as http://env-proxy.com.",
+            "but the environment variable 'HTTPS_PROXY/HTTP_PROXY' defines proxy as http://env-proxy.com.",
         ):
             get_client(client_configuration=client_configuration)