Updated documentation wording

Author: sharwell

src/corelib/Providers/Rackspace/ProviderBase`1.cs

@@ -975,7 +975,7 @@ protected Func<Task<Tuple<IdentityToken, Uri>>, Task<HttpWebRequest>> PrepareReq
         /// <see cref="HttpWebRequest.ContentType"/> and <see cref="HttpWebRequest.ContentLength"/>
         /// properties are updated to reflect the JSON content.
         /// </remarks>
-        /// <typeparam name="TBody">The object modeling the body of the request.</typeparam>
+        /// <typeparam name="TBody">The type modeling the body of the request.</typeparam>
         /// <param name="request">The <see cref="HttpWebRequest"/> object for the request.</param>
         /// <param name="body">The object modeling the body of the request.</param>
         /// <returns>The encoded content to send with the <see cref="HttpWebRequest"/>.</returns>