Update register-unregister.md

Author: JonathanMagnan

docs2/pages/documentations/register-unregister.md

@@ -15,6 +15,7 @@ You can register:
 - RegisterExtensionMethod(param MethodInfo[])
 - RegisterGlobalConstant(string key, object value)
 - RegisterGlobalVariable(string key, object value)
+- RegisterNamespace(Assembly assembly, string name)
 - RegisterStaticMember(param Type[])
 - RegisterStaticMember(param MemberInfo[])
 - RegisterType(param Type[])
@@ -58,6 +59,7 @@ You can unregister:
 - UnregisterExtensionMethod(param MethodInfo[])
 - UnregisterGlobalConstant(param string[] aliases)
 - UnregisterGlobalVariable(param string[] aliases)
+- UnregisterNamespace(Assembly assembly, string name)
 - UnregisterStaticMember(param Type[])
 - UnregisterStaticMember(param MemberInfo[])
 - UnregisterType(param Type[])