Fix spelling of Gatan

Co-authored-by: Johan Torin <jtorin@users.noreply.github.com>

src/test/java/org/opentripplanner/routing/trippattern/DeduplicatorTest.java

@@ -293,7 +293,7 @@ static I18NString translatedString() {
       "de",
       "Helmut-Kohl-Straße",
       "se",
-      "Helmuth Kohl Gattan "
+      "Helmuth Kohl Gatan"
     );
   }
 }