typo: Resturns -> Returns (#2186)

Author: nschonni

xml/System.ComponentModel/DependencyPropertyDescriptor.xml

@@ -656,7 +656,7 @@
       </Parameters>
       <Docs>
         <param name="component">The component instance.</param>
-        <summary>Resturns the current value of the property on a component.</summary>
+        <summary>Returns the current value of the property on a component.</summary>
         <returns>The requested value.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[