Update airsonic-main/src/test/java/org/airsonic/player/service/search/AnalyzerFactoryTestCase.java

Fix comment

Co-Authored-By: jvoisin <jvoisin@users.noreply.github.com>

airsonic-main/src/test/java/org/airsonic/player/service/search/AnalyzerFactoryTestCase.java

@@ -424,7 +424,7 @@ public class AnalyzerFactoryTestCase {
         assertEquals("988", terms.get(4));
         assertEquals("aria", terms.get(5));
 
-        // Underbars around words, ascii and semicolon.
+        // Underscores around words, ascii and semicolon.
         query = "_ID3_ARTIST_ Céline Frisch: Café Zimmermann";
         terms = toTermString(query);
         assertEquals(5, terms.size());