Add information on support for git v2 in docs
What does this MR do?
Mention that SSH service is already configured in Helm charts and All-in-one docker images.
- MR adding it to Helm charts - gitlab-org/build/CNG!175 (merged)
- MR adding it to docker image - omnibus-gitlab!2864 (merged)
Edited by Balasankar 'Balu' C