DDC-3810: [GH-1450] [DX] Link annotation ref to locking explanation

[doctrinebot]

Jira issue originally created by user @doctrinebot:

This issue is created automatically through a Github pull request on behalf of davidfuhr:

Url: #1450

Message:

The annotation reference contained no cross reference to the great
transaction and concurrency page. But this might be very useful for the
reader.

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1450] was assigned:
#1450

[doctrinebot]

Comment created by @doctrinebot:

A related Github Pull-Request [GH-1450] was merged:
#1450

[doctrinebot]

Issue was closed with resolution "Fixed"