add inline docs to GenerateCustomIdStringAsync method

src/Discord.Net.Interactions/InteractionService.cs

@@ -910,13 +910,22 @@ namespace Discord.Interactions
         /// </summary>
         /// <typeparam name="T">Type of the object to be serialized.</typeparam>
         /// <param name="obj">Object to be serialized.</param>
-        /// <param name="services">Services that will be passed on to the TypeReader.</param>
+        /// <param name="services">Services that will be passed on to the <see cref="TypeReader"/>.</param>
         /// <returns>
         ///     A task representing the conversion process. The task result contains the result of the conversion.
         /// </returns>
         public Task<string> SerializeValueAsync<T>(T obj, IServiceProvider services) =>
             _typeReaderMap.Get(typeof(T), services).SerializeAsync(obj, services);
 
+        /// <summary>
+        ///     Serialize and format multiple objects into a Custom Id string.
+        /// </summary>
+        /// <param name="format">A composite format string.</param>
+        /// <param name="services">>Services that will be passed on to the <see cref="TypeReader"/>s.</param>
+        /// <param name="args">Objects to be serialized.</param>
+        /// <returns>
+        ///     A task representing the conversion process. The task result contains the result of the conversion.
+        /// </returns>
         public async Task<string> GenerateCustomIdStringAsync(string format, IServiceProvider services, params object[] args)
         {
             var serializedValues = new string[args.Length];
@@ -925,7 +934,7 @@ namespace Discord.Interactions
             {
                 var arg = args[i];
                 var typeReader = _typeReaderMap.Get(arg.GetType(), null);
-                var result = await typeReader.SerializeAsync(arg, services);
+                var result = await typeReader.SerializeAsync(arg, services).ConfigureAwait(false);
                 serializedValues[i] = result;
             }