Rename Version Manifest Source heading

Description

For clarity, should the "Version Manifest Source" heading for this section be renamed to "Version Source" ? The property this section refers to is automation.versions.source which is the source of the binaries. 

https://docs.opsmanager.mongodb.com/current/reference/configuration/index.html#Version-Manifest-Source

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)