Fix typo: 'kthe' -> 'the' in TypeMapAttribute parameter description

Co-authored-by: AaronRobinsonMSFT <30635565+AaronRobinsonMSFT@users.noreply.github.com>

Author: Copilot

xml/System.Runtime.InteropServices/TypeMapAttribute`1.xml

@@ -88,7 +88,7 @@ Many of these instructions can be passed a generic parameter. In that case, the
         <Parameter Name="target" Type="System.Type" />
       </Parameters>
       <Docs>
-        <param name="value">The string representation of kthe key.</param>
+        <param name="value">The string representation of the key.</param>
         <param name="target">The type value.</param>
         <summary>Initializes a new instance of <see cref="T:System.Runtime.InteropServices.TypeMapAttribute`1" />.</summary>
         <remarks>This mapping is unconditionally inserted into the type map.</remarks>