Fix mechmini2 ortho keymapping layout

A misconfiguration in the ortho layout, K306 key was registered as k305

keyboards/mechmini/v2/v2.h

@@ -27,7 +27,7 @@
 	{ K000,  K001,  K002,  K003,  K004,  K005,  K006,  K007,  K008,  K009,  K010,  K011 }, \
 	{ K100,  K101,  K102,  K103,  K104,  K105,  K106,  K107,  K108,  K109,  K110,  K111 }, \
 	{ K200,  K201,  K202,  K203,  K204,  K205,  K206,  K207,  K208,  K209,  K210,  K211 }, \
-	{ K300,  K301,  K302,  K303,  K304,  K305,  K305,  K307,  K308,  K309,  K310,  K311 }  \
+	{ K300,  K301,  K302,  K303,  K304,  K305,  K306,  K307,  K308,  K309,  K310,  K311 }  \
 }
 
 #define KEYMAP_625_SPACE( \