Update index.md for Flyte with gRPC

Set the draft status to true and added cascade for draft.

Author: pareenaverma

content/learning-paths/servers-and-cloud-computing/flyte-with-grpc/_index.md

@@ -1,6 +1,10 @@
 ---
 title: Build ML Workflow Pipelines with Flyte and gRPC on Google Cloud C4A Axion processors
 
+draft: true
+cascade:
+    draft: true
+    
 minutes_to_complete: 30
 
 who_is_this_for: This is an introductory topic for developers, data engineers, and ML engineers who want to build scalable machine learning workflow pipelines on Arm64-based Google Cloud C4A Axion processors using Flyte workflow orchestration and gRPC-based microservices.