fix: fix the comment

Author: zoff99

toxcore/group_common.h

@@ -45,7 +45,7 @@
 /* Max size of a complete encrypted packet including headers. */
 #define MAX_GC_PACKET_SIZE (MAX_GC_PACKET_CHUNK_SIZE * 100)
 
-/* Allow incoming NGC custom packets that are non private to be up to the total max size of MAX_GC_PACKET_SIZE.
+/* Allow incoming NGC custom packets to be up to the total max size of MAX_GC_PACKET_SIZE.
  * The data itself can only be less than that because of NGC header overhead
  */
 #define MAX_GC_CUSTOM_LOSSLESS_INCOMING_ASSEMBLED_PACKET_SIZE MAX_GC_PACKET_SIZE