[Docs] improve contribute docs #5110

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	5m 0s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 17s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 26s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	4m 20s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	56s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	5m 48s
Dry Run Goreleaser	7m 29s
Test Getting started	6m 51s
Check Go Generate (datacatalog) / Go Generate	1m 21s
Check Go Generate (flyteadmin) / Go Generate	2m 3s
Check Go Generate (flytecopilot) / Go Generate	1m 18s
Check Go Generate (flytepropeller) / Go Generate	2m 3s
Check Go Generate (flytectl) / Go Generate	1m 57s
Unit Tests (datacatalog) / Run Unit Test	2m 50s
Unit Tests (flyteadmin) / Run Unit Test	4m 17s
Unit Tests (flytecopilot) / Run Unit Test	2m 41s
Unit Tests (flytectl) / Run Unit Test	3m 24s
Lint (datacatalog) / Run Lint	2m 13s
Lint (flyteadmin) / Run Lint	2m 47s
Lint (flytectl) / Run Lint	2m 24s
Lint (flyteidl) / Run Lint	1m 49s
Lint (flyteplugins) / Run Lint	2m 49s
Lint (flytestdlib) / Run Lint	2m 25s
Lint (flytepropeller) / Run Lint	2m 56s
Unit Tests (flyteplugins) / Run Unit Test	3m 58s
Unit Tests (flytepropeller) / Run Unit Test	4m 7s
Unit Tests (flytestdlib) / Run Unit Test	3m 39s
Integration Test (flyteadmin) / Integration tests	6m 7s
	1h 37m 16s

Provide feedback