correct typo in setting FAI_RAMDISKS

examples/simple/class/DEBIAN.var

@@ -9,7 +9,7 @@ MODULESLIST="usbhid psmouse"
 
 # if you have enough RAM (>2GB) you may want to enable this line. It
 # also puts /var/cache into a ramdisk.
-#FAI_RAMDISKS:="$target/var/lib/dpkg $target/var/cache"
+#FAI_RAMDISKS="$target/var/lib/dpkg $target/var/cache"
 
 # if you want to use the faiserver as APT proxy
 #APTPROXY=http://faiserver:3142