Docs: Add docblock for get_the_archive_title() filter

[justinahinon]

In [48294] a span element was introduced to wrap around the get_the_archive_title() filter. Details for this changes is needed in the filter docblock.

[audrasjb]

Thanks for opening the ticket, @justinahinon,

By the way, this filter is actually properly documented: ​https://developer.wordpress.org/reference/hooks/get_the_archive_title/

"@since 5.5.0 Added the $prefix and $original_title parameters."

I guess you're rather talking about get_the_archive_title function.

In 51050.diff, I added an @since mention, but not completely sure it's necessary as the filter is already documented. I'd defer on @SergeyBiryukov ’s judgement for that :)

[justinahinon]

Replying to audrasjb:

I guess you're rather talking about get_the_archive_title function.

Yes Jb. I was referring to the function ​https://developer.wordpress.org/reference/functions/get_the_archive_title.

Thanks for the patch.

[SergeyBiryukov]

In 48814:

Docs: Add a @since note to get_the_archive_title() about the title part being wrapped in a <span> element.

Follow-up to [48294].

Props justinahinon, audrasjb.
Fixes #51050.

[SergeyBiryukov]

In 48815:

Docs: Add a @since note to get_the_archive_title() about the title part being wrapped in a <span> element.

Follow-up to [48294].

Props justinahinon, audrasjb.
Merges [48814] to the 5.5 branch.
Fixes #51050.