[Keyboard] Update Grandiceps to Rev2 (#14618)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Dasky <32983009+daskygit@users.noreply.github.com>
Co-authored-by: Thys de Wet <thys@vectorphoto.co.uk>

keyboards/tkw/grandiceps/info.json

@@ -2,7 +2,7 @@
     "keyboard_name": "grandiceps",
     "url": "https://github.com/vattern/grandiceps",
     "maintainer": "vattern",
-    "manufacturer": "TKW",
+    "manufacturer": "tkw",
     "layouts": {
         "LAYOUT": {
             "layout": [