Standardize WireMock version to 3.12.1\n\nAlign transport options test with the version used in other tests.

Author: mridang

test/test_transport_options.py

@@ -42,7 +42,7 @@ def setup_class(cls) -> None:
         cls.network = Network().create()
 
         cls.wiremock = (
-            DockerContainer("wiremock/wiremock:3.3.1")
+            DockerContainer("wiremock/wiremock:3.12.1")
             .with_network(cls.network)
             .with_network_aliases("wiremock")
             .with_exposed_ports(8080, 8443)