RE: [PGdocs] fix description for handling pf non-ASCII characters

Dear Tom,

Thank you for giving a comment!
New patch is available in [1].

> I'd be inclined to keep the text as simple as possible and not focus on
> the distinction between bytes and characters.
>

Okay, in the latest version, the word "byte" was removed.

[1]:
https://www.postgresql.org/message-id/TYAPR01MB5866DD962CA4FC03E338C6BBF5C1A%40TYAPR01MB5866.jpnprd01.prod.outlook.com

Best Regards,
Hayato Kuroda
FUJITSU LIMITED