docs(ray): Update kuberay documentation #2909

Job	Run time
unpack-envvars	1s
Docker Build Images (flyteadmin) / build_docker	2m 42s
Docker Build Images (datacatalog) / build_docker	2m 12s
Docker Build Images (flytecopilot) / build_docker	2m 4s
Docker Build Images (flytepropeller) / build_docker	3m 5s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	2m 35s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	3m 14s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	2m 33s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	3m 32s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	3m 31s
Lint (datacatalog) / Run Lint	2m 25s
Lint (flyteidl) / Run Lint	1m 57s
Lint (flyteplugins) / Run Lint	2m 59s
Lint (flytepropeller) / Run Lint	3m 13s
Lint (flyteadmin) / Run Lint	3m 8s
Lint (flytestdlib) / Run Lint	2m 31s
Unit Tests (datacatalog) / Run Unit Test	3m 8s
Unit Tests (flyteadmin) / Run Unit Test	4m 28s
Check Go Generate (datacatalog) / Go Generate	1m 34s
Check Go Generate (flyteadmin) / Go Generate	2m 11s
Check Go Generate (flytecopilot) / Go Generate	1m 28s
Check Go Generate (flytepropeller) / Go Generate	2m 16s
Unit Tests (flytecopilot) / Run Unit Test	2m 45s
Unit Tests (flyteplugins) / Run Unit Test	4m 0s
Unit Tests (flytepropeller) / Run Unit Test	4m 20s
Unit Tests (flytestdlib) / Run Unit Test	3m 40s
Integration Test (flyteadmin) / Integration tests	6m 15s
	1h 17m 47s

Provide feedback