style: apply gradle task spotlessApply

CI/CD is failing without this commit.

Co-authored-by: billpapat <50835814+billpapat@users.noreply.github.com>
Co-authored-by: Chris Sdogkos <work@chris-sdogkos.com>
Mentored-by: Chris Sdogkos <work@chris-sdogkos.com>

Author: billpapat

application/src/main/java/org/togetherjava/tjbot/features/basic/SuggestionsUpDownVoter.java

@@ -59,7 +59,7 @@ private static void createThread(Message message) {
         String threadTitle;
         String messageContent = message.getContentRaw();
 
-        if (messageContent.isEmpty()){
+        if (messageContent.isEmpty()) {
             threadTitle = message.getAuthor().getName();
         } else if (messageContent.length() >= TITLE_MAX_LENGTH) {
             int lastWordEnd = messageContent.lastIndexOf(' ', TITLE_MAX_LENGTH);