fix pipeline

src/test/java/at/ac/uibk/gitsearch/repository/search/MetaDataRepositoryIT.java

@@ -137,7 +137,7 @@ public class MetaDataRepositoryIT {
         // test
         // data
         // changes
-        Assert.assertEquals(2, exerciseCollectionTree.getChildren().get(1).getChildren().size()); // this may change when test data
+        Assert.assertEquals(2, exerciseCollectionTree.getChildren().get(0).getChildren().size()); // this may change when test data
         // changes
     }
 }