Update index.adoc

[jonomacx]

Edited apoc.uuid.setup link as the xref was pointing to apoc.uuid.show

Fixes #<Replace with the number of the issue, Mandatory>

One sentence summary of the change.

Proposed Changes (Mandatory)

A brief list of proposed changes in order to fix the issue:

• Edited apoc.uuid.setup link as the xref was pointing to apoc.uuid.show