Update package.config too

Author: peiche-ms

SampleApps/WebView2APISample/packages.config

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Web.WebView2" version="0.9.628-prerelease" targetFramework="native" />
+  <package id="Microsoft.Web.WebView2" version="0.9.579-prerelease" targetFramework="native" />
   <package id="Microsoft.Windows.ImplementationLibrary" version="1.0.191107.2" targetFramework="native" />
 </packages>