Format the project with 'dotnet format' (#2551)

* Sync and Re-Format

* Fix Title string.

* Fix indentation.

src/Discord.Net.Rest/API/Rest/CreateWebhookMessageParams.cs

@@ -13,7 +13,7 @@ namespace Discord.API.Rest
         private static JsonSerializer _serializer = new JsonSerializer { ContractResolver = new DiscordContractResolver() };
 
         [JsonProperty("content")]
-        public Optional<string> Content { get; set;  }
+        public Optional<string> Content { get; set; }
 
         [JsonProperty("nonce")]
         public Optional<string> Nonce { get; set; }