wrong typehint for second argument($default) of get_theme_mod

[mskapusuz]

Hey!

get_theme_mod($name, $default)

accepts two parameter, the second parameter is $default.

type of the $default has defined as string|false but we can use it as array like the $default args of the get_option() function.

I think, the phpdoc should be mixed instead of string|false on here: ​https://prnt.sc/198s94m

also on source code: ​https://github.com/WordPress/WordPress/blob/ccdb1766aead26d4cef79badb015bb2727fefd59/wp-includes/theme.php#L1000

thanks!