Docs: Updated CONTRIBUTING.md to provide more details about the PR process
Docs: Updated CONTRIBUTING.md to provide more details about the PR process

Closes #6323

fubuki/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,fubuki/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch,aparo/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch,fubuki/elasticsearch,aparo/elasticsearch