[Docs] improve contribute docs #5111

Job	Run time
unpack-envvars	1s
flyteadmin integration tests image / build_docker	4m 57s
Build Images / Build & Push Image (datacatalog) / Push to Github Registry	4m 10s
Build Images / Build & Push Image (flyteadmin) / Push to Github Registry	5m 43s
Build Images / Build & Push Image (flytecopilot) / Push to Github Registry	3m 56s
Build Images / Build & Push Image (flytepropeller) / Push to Github Registry	39s
Build Images / Build & Push Image (flytescheduler) / Push to Github Registry	38s
Dry Run Goreleaser	7m 18s
Test Getting started	4m 47s
Check Go Generate (flytecopilot) / Go Generate	58s
Check Go Generate (flytectl) / Go Generate	1m 36s
Check Go Generate (datacatalog) / Go Generate	1m 0s
Check Go Generate (flyteadmin) / Go Generate	1m 59s
Check Go Generate (flytepropeller) / Go Generate	1m 55s
Lint (datacatalog) / Run Lint	1m 59s
Lint (flyteadmin) / Run Lint	2m 36s
Lint (flytectl) / Run Lint	1m 51s
Lint (flyteidl) / Run Lint	1m 30s
Lint (flyteplugins) / Run Lint	2m 31s
Lint (flytepropeller) / Run Lint	2m 40s
Lint (flytestdlib) / Run Lint	2m 12s
Unit Tests (datacatalog) / Run Unit Test	2m 40s
Unit Tests (flyteadmin) / Run Unit Test	4m 6s
Unit Tests (flytecopilot) / Run Unit Test	2m 22s
Unit Tests (flytectl) / Run Unit Test	3m 4s
Unit Tests (flyteplugins) / Run Unit Test	3m 32s
Unit Tests (flytepropeller) / Run Unit Test	3m 45s
Unit Tests (flytestdlib) / Run Unit Test	3m 17s
Integration Test (flyteadmin) / Integration tests	6m 34s
	1h 24m 16s

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