Duplicate board files for blok converter (#20629)

* Duplicate board files for blok converter

* Swap converters board file too

* Update platforms/chibios/boards/QMK_BLOK/configs/board.h

data/mappings/defaults.hjson

@@ -33,7 +33,7 @@
         "blok": {
             "processor": "RP2040",
             "bootloader": "rp2040",
-            "board": "QMK_PM2040"
+            "board": "QMK_BLOK"
         },
         "michi": {
             "processor": "RP2040",