fix(boards): Assign preonic_rev3 chosen console

Quick fix to make USB-logging work on the Preonic.

app/boards/arm/preonic/preonic_rev3.dts

@@ -17,6 +17,7 @@
     chosen {
         zephyr,sram = &sram0;
         zephyr,flash = &flash0;
+        zephyr,console = &cdc_acm_uart;
         zmk,kscan = &kscan0;
         zmk,matrix-transform = &layout_grid_transform;
     };