Typo fix on Problem's documentation (#13812)

Author: DynamicField

src/Mvc/Mvc.Core/src/ControllerBase.cs

@@ -1848,7 +1848,7 @@ public virtual ConflictObjectResult Conflict([ActionResultObjectValue] ModelStat
         /// <summary>
         /// Creates an <see cref="ObjectResult"/> that produces a <see cref="ProblemDetails"/> response.
         /// </summary>
-        /// <param name="statusCode">The value for <see cref="ProblemDetails.Status" />..</param>
+        /// <param name="statusCode">The value for <see cref="ProblemDetails.Status" />.</param>
         /// <param name="detail">The value for <see cref="ProblemDetails.Detail" />.</param>
         /// <param name="instance">The value for <see cref="ProblemDetails.Instance" />.</param>
         /// <param name="title">The value for <see cref="ProblemDetails.Title" />.</param>