Move GMMK Pro layouts to the correct subdir (#14241)

Also fix a compilation issue in the mike1808 keymap

keyboards/gmmk/pro/ansi/keymaps/mike1808/mike1808.c

@@ -20,7 +20,7 @@
 #else
 // `PROGMEM const char secret[][x]` may work better, but it takes up more space in the firmware
 // And I'm not familiar enough to know which is better or why...
-static const char *const secret[] = {"test1", "test2", "test3", "test4", "test5"};
+static const char *const secrets[] = {"test1", "test2", "test3", "test4", "test5"};
 #endif
 
 // userspace_config_t userspace_config;