typo: begining -> beginning (#2180)

Author: nschonni

xml/System.Configuration.Install/InstallerCollection.xml

@@ -269,7 +269,7 @@
       <Docs>
         <param name="array">The array to copy to.</param>
         <param name="index">The index of the array at which to paste the collection.</param>
-        <summary>Copies the items from the collection to an array, begining at the specified index.</summary>
+        <summary>Copies the items from the collection to an array, beginning at the specified index.</summary>
         <remarks>
           <format type="text/markdown"><![CDATA[