Update readme fix typo

Author: Inbal Tako

README.md

@@ -92,7 +92,7 @@ from securenative.models.user_traits import UserTraits
 
 securenative = SecureNative.get_instance()
 
-context = SecureNative.context_builder().with_ip("127.0.0.1").with_client_token("SECURED_CLIENT_TOKEN").with_headers({"user-agent", "Mozilla/5.0 (iPad; U; CPU OS 3_2_1 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405"}).build()
+context = SecureNative.context_builder().with_ip("127.0.0.1").with_client_token("SECURED_CLIENT_TOKEN").with_headers({"user-agent": "Mozilla/5.0 (iPad; U; CPU OS 3_2_1 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405"}).build()
 event_options = EventOptionsBuilder(EventTypes.LOG_IN).with_user_id("1234").with_user_traits(UserTraits("Your Name", "[email protected]", "+1234567890")).with_context(context).with_properties({"prop1": "CUSTOM_PARAM_VALUE", "prop2": True, "prop3": 3}).build()
 
 securenative.track(event_options)