Fixes dotnet/docs#7926 (dotnet#567)

* Fixes dotnet#7926 * Fixed typo - I blame lack of coffee at 3 AM

Author: IcecreamBurglar

xml/System.Reflection/RuntimeReflectionExtensions.xml

@@ -490,7 +490,12 @@
  <summary>Retrieves an object that represents a specified property.</summary>
  <returns>An object that represents the specified property, or <see langword="null" /> if the property is not found.</returns>
  <remarks>To be added.</remarks>
+ <exception cref="T:System.ArgumentNullException">
+ <paramref name="type" /> is <see langword="null" />.</exception>
+ <exception cref="T:System.ArgumentException">
+ <paramref name="type" /> is not a <see langword="RuntimeType" />.</exception>
+ <exception cref="T:System.Reflection.AmbiguousMatchException">More than one property with the requested name was found.</exception>
  </Docs>
  </Member>
  </Members>
-</Type>
+</Type>