Convert bracketed text to links in dev-manage documentation

Why is this change being made?

Previously there was some bracketed text in one section of the Manage index documentation page. This converts that bracketed text into links to the appropriate areas of the handbook.

Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what