Refactor: group hub keyboards (#22762)

data/mappings/keyboard_aliases.hjson

@@ -287,6 +287,12 @@
     "honeycomb": {
         "target": "keyhive/honeycomb"
     },
+    "hub16": {
+        "target": "joshajohnson/hub16"
+    },
+    "hub20": {
+        "target": "joshajohnson/hub20"
+    },
     "idb_60": {
         "target": "idb/idb_60"
     },

keyboards/joshajohnson/hub16/readme.md

@@ -10,11 +10,11 @@ For more information regarding the keyboard, please visit the [Hub16 Website](ht
 
 Make example for this keyboard (after setting up your build environment):
 
-    make hub16:default
+    make joshajohnson/hub16:default
 
 Flashing example for this keyboard:
 
-    make hub16:default:flash
+    make joshajohnson/hub16:default:flash
 
 To reset the board into bootloader mode, do one of the following:
 

keyboards/joshajohnson/hub20/readme.md

@@ -10,11 +10,11 @@ For more information regarding the keyboard, please visit the [Hub20 Website](ht
 
 Make example for this keyboard (after setting up your build environment):
 
-    make hub20:default
+    make joshajohnson/hub20:default
 
 Flashing example for this keyboard:
 
-    make hub20:default:flash
+    make joshajohnson/hub20:default:flash
 
 To reset the board into bootloader mode, do one of the following: