Fix release script

extra/beta/update-version.js

@@ -5,7 +5,7 @@ const util = require("../../src/util");
 
 util.polyfill();
 
-const version = process.env.VERSION;
+const version = process.env.RELEASE_BETA_VERSION;
 
 console.log("Beta Version: " + version);
 

extra/update-version.js

@@ -5,7 +5,7 @@ const util = require("../src/util");
 
 util.polyfill();
 
-const newVersion = process.env.VERSION;
+const newVersion = process.env.RELEASE_VERSION;
 
 console.log("New Version: " + newVersion);
 

extra/update-wiki-version.js

@@ -1,7 +1,7 @@
 const childProcess = require("child_process");
 const fs = require("fs");
 
-const newVersion = process.env.VERSION;
+const newVersion = process.env.RELEASE_VERSION;
 
 if (!newVersion) {
     console.log("Missing version");