Missing returns from System.Reflection.MetadataLoadContext.LoadFromStream (#2965)

Author: carlossanlop

xml/System.Reflection/MetadataLoadContext.xml

@@ -312,7 +312,7 @@ Note that the behavior of this method matches the behavior of the <xref:System.R
       <Docs>
         <param name="assembly">A <see cref="T:System.IO.Stream" /> holding an assembly.</param>
         <summary>Loads an assembly from a stream and binds its assembly name to it in the <see cref="T:System.Reflection.MetadataLoadContext" />. If a prior assembly with the same name was already loaded into the <see cref="T:System.Reflection.MetadataLoadContext" />, the prior assembly will be returned.</summary>
-        <returns>To be added.</returns>
+        <returns>The loaded assembly.</returns>
         <remarks>
           <format type="text/markdown"><![CDATA[