Change lab completion time from 30 to 15 minutes

Updated the estimated completion time for the lab.

Author: anjenni

Instructions/Labs/LAB[PL-200]_M04L01_Canvas.md

@@ -9,7 +9,7 @@ lab:
 ## Scenario  
 You are a Power Platform functional consultant working with the Contoso team. You’ve been asked to create a simple Canvas app that allows users to view and update milestone records stored in Microsoft Dataverse.
 
-This lab will take approximately **30** minutes to complete. 
+This lab will take approximately **15** minutes to complete. 
 
 ## Exercise 1: Create Canvas App from Milestones Table