Bluetooth samples: unicast server: L2CAP configuration workaround

Due to this bug:
https://github.com/zephyrproject-rtos/zephyr/issues/64574
We need to increase the number of L2CAP Tx Buffers
so this sample can be used.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>
1 file changed