small improvement to XML doc comment

Author: Mrxx99

src/libraries/System.Private.CoreLib/src/System/Collections/Generic/CollectionExtensions.cs

@@ -69,7 +69,7 @@ public static ReadOnlyCollection<T> AsReadOnly<T>(this IList<T> list) =>
         /// Returns a read-only <see cref="ReadOnlySet{T}"/> wrapper
         /// for the specified set.
         /// </summary>
-        /// <typeparam name="T">The type of elements in the collection.</typeparam>
+        /// <typeparam name="T">The type of elements in the set.</typeparam>
         /// <param name="set">The set to wrap.</param>
         /// <returns>An object that acts as a read-only wrapper around the current <see cref="ISet{T}"/>.</returns>
         /// <exception cref="ArgumentNullException"><paramref name="set"/> is null.</exception>