DocBlock of wp_schedule_single_event() should mention 10 minute lock

[medariox]

The codex has this note

Note that scheduling an event to occur before 10 minutes after an existing event of the same name will be ignored, unless you pass unique values for $args to each scheduled event. See wp_next_scheduled() for more information.

(​https://codex.wordpress.org/Function_Reference/wp_schedule_single_event)

This should be added to the DocBlock so it's also available on ​https://developer.wordpress.org/reference/functions/wp_schedule_single_event/.

[swissspidy]

Introduced in [9181], altered in [29939].

Re: the patch, See wp_next_scheduled() for more information. should probably be added as @see wp_next_scheduled(). "before 10 minutes after an existing event of the same name" sound weird. What about something along the lines of "within 10 minutes of an existing event", like in the inline comment below?

[SergeyBiryukov]

wp_next_scheduled() does not really provide any additional information, so I'd probably skip that bit.

[SergeyBiryukov]

In 38148:

Docs: In wp_schedule_single_event(), add a note about scheduling an event to occur within 10 minutes of another event with the same action hook.

Props medariox.
Fixes #37455.