Update libraries.conf

Minor updates to rngs extension, removing random distributions that have been added as core NetLogo functionality.

Author: AFMac

libraries.conf

@@ -478,9 +478,9 @@ The profiler extension is experimental. It is not yet well tested or user friend
   {
     name: "Expanded Random Number Generator"
     codeName: "rngs"
-    shortDescription: "Multiple independent streams and expanded random distributions"
+    shortDescription: "Multiple independent streams of random numbers and expansion of available random distributions"
     longDescription: """This extension allows the user to define multiple independent streams of random numbers and provides access to an expanded selection of discrete and continuous random distributions."""
-    version: "2.0"
+    version: "2.1"
     homepage: "https://github.com/AFMac/rngs"
     downloadURL: "https://raw.githubusercontent.com/NetLogo/NetLogo-Libraries/6.1/extensions/rngs-2.0.zip"
   }