Add a missing link

bios/cookie/description/MgMc.ui

@@ -8,7 +8,7 @@
 The cookie is created by the alternative operating system
 (!link [MagiC Mac][MagiC Mac specifics]), 
 a port of MagiC to the hardware of the Apple (Power) Macintosh, and 
-points to a MgMc cookie structure.
+points to a (!link [MgMc][The MagiC Mac cookie]) cookie structure.
 
 See also: (!link [MagX][Cookie, MagX]) ~ (!link [MgMx][Cookie, MgMx]) ~
 (!link [MgPC][Cookie, MgPC])