discord-rest: Fix status code expectation

A successful send will produce a 200 code.

bot/src/main/java/de/hhhammer/dchat/bot/MessageService.java

@@ -43,6 +43,6 @@ public final class MessageService {
             }
         };
         logger.debug("Handling message in new process: {}", originalMessageId);
-        Thread.startVirtualThread(callable).start();
+        Thread.startVirtualThread(callable);
     }
 }

discord-rest/src/main/java/de/hhhammer/dchat/discord/rest/DiscordRest.java

@@ -34,7 +34,7 @@ public final class DiscordRest {
                 .build();
 
         final HttpResponse<Void> response = httpClient.send(request, HttpResponse.BodyHandlers.discarding());
-        if (response.statusCode() != 201) {
+        if (response.statusCode() != 200) {
             logger.error("Unexpected status code: {}", response.statusCode());
         }
     }