register_taxonomy: argument type in docblock comment does not match with the parameter type

[audrasjb]

In function register_taxonomy, located in /wp-includes/taxonomy.php:

 *     @type string        $query_var 

should be:

 *     @type bool|string        $query_var

since false could be passed as an argument for this parameter.

Current DevHub documentation:
"query_var - (string) Sets the query var key for this taxonomy. Default $taxonomy key. If false, a taxonomy cannot be loaded at ?{query_var}={term_slug}. If a string, the query ?{query_var}={term_slug} will be valid."

[juiiee8487]

Created patch.

[juiiee8487]

Added patch.

[SergeyBiryukov]

In 45797:

Docs: Correct type for query_var argument of register_taxonomy().

Props juiiee8487, audrasjb.
Fixes #47877.