Update readme.md for P2 archive

Author: PropGit

libraries/community/p2/readme.md

@@ -2,7 +2,7 @@
 Community generated Propeller libraries for Propeller 2 microcontroller.
 
 ## Download Archive
-Download an [archive of the Propeller 2 libraries](https://github.com/parallaxinc/propeller/releases/download/OBEX-230411/P2_OBEX_230411.ZIP).
+Download an [archive of the Propeller 2 libraries](https://github.com/parallaxinc/propeller/releases/download/OBEX-230720/P2_OBEX_2300720.ZIP).
 
 ## Contribute
 Please [contribute your objects](https://github.com/parallaxinc/propeller/wiki/Contributing) to this community archive for the benefit of all!