In the PS v1.4 pages 13-15 related to the QFN package.
Pins 11, 12 (P0.09, P0.10) are marked with the note '1'.
On page 15, at the bottom, the notes are enumerated:
1. See GPIO located near the radio on page 17 for more information.
2. See NFC antenna pins on page 17 for more information.
I am guessing that these notes are reversed?
Only pins 11 and 12 are noted as 'near the radio' but also are the NFC antenna pins based on the 'Description' column.