updated man page

dmenu.1

@@ -58,7 +58,7 @@ if Enter is pressed on termination,
 .B 1
 if Escape is pressed.
 .SH CUSTOMIZATION
-.B dwm
+.B dmenu
 is customized by creating a custom config.h and (re)compiling the source
 code. This keeps it fast, secure and simple.
 .SH SEE ALSO