Make image names a little more sensical

doc/Version 2.0.md

@@ -6,13 +6,13 @@ Download the four disk images (three if you don't plan to boot an Apple ///):
 
 [PLASMA 2.0 DP 800K Full System](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA2.2mg?raw=true)
 
-[PLASMA 2.0 DP System and ProDOS Boot](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA-SYS2.PO?raw=true)
+[PLASMA 2.0 DP System and ProDOS Boot](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA2-SYS.PO?raw=true)
 
-[PLASMA 2.0 DP Build Tools](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA-BLD2.PO?raw=true)
+[PLASMA 2.0 DP Build Tools](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA2-BLD.PO?raw=true)
 
-[PLASMA 2.0 DP Demos](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA-DEM2.PO?raw=true)
+[PLASMA 2.0 DP Demos](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA2-DEM.PO?raw=true)
 
-[PLASMA 2.0 DP Apple /// SOS Boot and SANE floating point modules](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA-SOS2.PO?raw=true)
+[PLASMA 2.0 DP Apple /// SOS Boot and SANE floating point modules](https://github.com/dschmenk/PLASMA/blob/master/images/apple/PLASMA2-FPSOS.PO?raw=true)
 
 PLASMA can be run from floppies, System in Drive 1, and Build or Demos in Drive 2. Mass storage is the recommended installation that looks like (replacing HARDISK with your volume name of choice):