add clarification to TreatAsRegex prop documentation.

src/Discord.Net.Interactions/Attributes/Commands/ComponentInteractionAttribute.cs

@@ -30,8 +30,11 @@ namespace Discord.Interactions
         public RunMode RunMode { get; }
 
         /// <summary>
-        ///     Gets or sets whether the <see cref="CustomId"/> should be treated as a raw Regex pattern.
+        ///     Gets or sets whether the <see cref="CustomId"/> should be treated as a raw Regex pattern. 
         /// </summary>
+        /// <remarks>
+        ///     <see langword="false"/> defaults to the pattern used before 3.9.0.
+        /// </remarks>
         public bool TreatAsRegex { get; set; } = false;
 
         /// <summary>

src/Discord.Net.Interactions/Attributes/Commands/ModalInteractionAttribute.cs

@@ -31,6 +31,9 @@ namespace Discord.Interactions
         /// <summary>
         ///     Gets or sets whether the <see cref="CustomId"/> should be treated as a raw Regex pattern.
         /// </summary>
+        /// <remarks>
+        ///     <see langword="false"/> defaults to the pattern used before 3.9.0.
+        /// </remarks>
         public bool TreatAsRegex { get; set; } = false;
 
         /// <summary>