Update xml/ns-System.Reflection.Metadata.xml

Co-authored-by: Genevieve Warren <[email protected]>

Author: steveharter

xml/ns-System.Reflection.Metadata.xml

@@ -1,6 +1,6 @@
 <Namespace Name="System.Reflection.Metadata">
   <Docs>
-    <summary>Provides low-level functionality for reading assembly metadata according to ECMA-335. It is designed for use by compilers and other tools that need to read assembly metadata.</summary>
+    <summary>Provides low-level functionality for reading assembly metadata according to ECMA-335. This namespace is designed to be used by compilers and other tools that need to read assembly metadata.</summary>
     <remarks>
       <format type="text/markdown"><![CDATA[