Patch 1
Created by: JamesMura
fix mixup in Install gems section https://github.com/gitlabhq/gitlabhq/blob/5-0-stable/doc/install/installation.md#install-gems
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Created by: JamesMura
fix mixup in Install gems section https://github.com/gitlabhq/gitlabhq/blob/5-0-stable/doc/install/installation.md#install-gems