autorenew docs mistmatch implementation

[tcfdev]

The Traffic Ops docs for the letsencrypt/autorenew API endpoint do not align with the implementation.

This Bug Report affects these Traffic Control components:

• Documentation

Current behavior:

v3.0 - Does not return a deprecation warning
v4.0/v5.0 - The deprecation warning says to use letsencrypt/autorenew (the now deprecated endpoint) rather than the correct route acme_autorenew

Expected behavior:

The docs would be accurate to the implementation