staging: rtl8723bs: xmit: rephrase comment and drop extra space

Rephrase the comment to avoid the "number of" construction and remove
an extra leading space.

Signed-off-by: Akiyoshi Kurita <weibu@redadmin.org>
Link: https://lore.kernel.org/r/20250917063729.1450525-1-weibu@redadmin.org


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>