Change label of title entry box for {{uw-agf-sock}} in "Warn" dialog

[Gestrid]

When I go to leave a Single-issue Warning using the {{uw-agf-sock}} template, it shows the text Linked article when it should be asking for the Sockpuppeteer or the Sock, or (as {{uw-socksuspect}} asks for in Twinkle) Username of sock master, if known (without User:). The text as-is confused me into thinking I needed to tell which page led me to believe the user was socking. Had I not previewed the warning, I wouldn't have realized the mistake.
I've attached a screenshot of the typo below.

[atlight]

Not as easy to fix as a typo, but it can be done.

[Amorymeltzer]

Done in c99e662