Fix keyboard for some JSON keymaps (#19251)

keyboards/hillside/48/keymaps/default/keymap.json

@@ -1,7 +1,7 @@
 {    "version": 1,
     "notes": "",
     "documentation": "\"This file is a QMK Configurator export. You can import this at <https://config.qmk.fm>. It can also be used directly with QMK's source code.\n\nTo setup your QMK environment check out the tutorial: <https://docs.qmk.fm/#/newbs>\n\nYou can convert this file to a keymap.c using this command: `qmk json2c {keymap}`\n\nYou can compile this keymap using this command: `qmk compile {keymap}`\"\n",
-    "keyboard": "hillside/48",
+    "keyboard": "hillside/48/0_1",
     "keymap": "default",
     "layout": "LAYOUT",
     "layers": [

keyboards/hillside/48/keymaps/via/keymap.json

@@ -1,6 +1,6 @@
 {    "version": 1,
     "notes": "",
-    "keyboard": "hillside/48",
+    "keyboard": "hillside/48/0_1",
     "keymap": "via",
     "layout": "LAYOUT",
     "layers": [