Enhance DateTimeOffset constructor summary

Updated the summary of the DateTimeOffset constructor to include calendar information.

Author: minhtaile2712

xml/System/DateTimeOffset.xml

@@ -910,7 +910,7 @@ This constructor interprets `year`, `month` and `day` as a year, month and day
         <param name="microsecond">The microseconds (0 through 999).</param>
         <param name="calendar">The calendar that is used to interpret <paramref name="year" />, <paramref name="month" />, and <paramref name="day" />.</param>
         <param name="offset">The time's offset from Coordinated Universal Time (UTC).</param>
-        <summary>Initializes a new instance of the <see cref="T:System.DateTimeOffset" /> structure using the specified <paramref name="year" />, <paramref name="month" />, <paramref name="day" />, <paramref name="hour" />, <paramref name="minute" />, <paramref name="second" />, <paramref name="millisecond" />, <paramref name="microsecond" /> and <paramref name="offset" />.</summary>
+        <summary>Initializes a new instance of the <see cref="T:System.DateTimeOffset" /> structure using the specified <paramref name="year" />, <paramref name="month" />, <paramref name="day" />, <paramref name="hour" />, <paramref name="minute" />, <paramref name="second" />, <paramref name="millisecond" />, <paramref name="microsecond" /> and <paramref name="offset" /> of a specified calendar.</summary>
         <remarks>
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