Fix type reference (#8563)

Fixes #7804

Author: Kissaki

xml/System/DateOnly.xml

@@ -211,7 +211,7 @@
       </Parameters>
       <Docs>
         <param name="value">The object to compare to the current instance.</param>
-        <summary>Compares the value of this instance to a specified <see cref="T:System.DateOnly" /> value and returns an integer that indicates whether this instance is earlier than, the same as, or later than the specified <see cref="T:System.DateTime" /> value.</summary>
+        <summary>Compares the value of this instance to a specified <see cref="T:System.DateOnly" /> value and returns an integer that indicates whether this instance is earlier than, the same as, or later than the specified <see cref="T:System.DateOnly" /> value.</summary>
         <returns>Less than zero if this instance is earlier than value. Greater than zero if this instance is later than value. Zero if this instance is the same as value.</returns>
         <remarks>To be added.</remarks>
       </Docs>