[YouTube] Fix search suggestion test

Author: TobiGr

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/search/YoutubeSearchExtractorTest.java

@@ -145,7 +145,7 @@ public static void setUp() throws Exception {
     public static class Suggestion extends DefaultSearchExtractorTest {
         private static SearchExtractor extractor;
         private static final String QUERY = "on board ing";
-        private static final String EXPECTED_SUGGESTION = "on boarding";
+        private static final String EXPECTED_SUGGESTION = "onboarding";
 
         @BeforeAll
         public static void setUp() throws Exception {