Update python-domain.md

Author: v-jaswel

articles/cognitive-services/Computer-vision/QuickStarts/python-domain.md

@@ -58,7 +58,7 @@ else:
 if 'COMPUTER_VISION_ENDPOINT' in os.environ:
     endpoint = os.environ['COMPUTER_VISION_ENDPOINT']
 
-landmark_analyze_url = endpoint + "vision/v2.1/models/landmarks/analyze"
+landmark_analyze_url = endpoint + "vision/v3.0/models/landmarks/analyze"
 
 # Set image_url to the URL of an image that you want to analyze.
 image_url = "https://upload.wikimedia.org/wikipedia/commons/f/f6/" + \