fix: wrong method used for 'to' parameter

solidify-index/src/main/java/ch/unige/solidify/controller/index/IndexingController.java

@@ -185,7 +185,7 @@ public abstract class IndexingController<T extends IndexMetadata> extends IndexR
         rangeCondition.setLowerValue(from);
       }
       if (!StringTool.isNullOrEmpty(to)) {
-        rangeCondition.setLowerValue(to);
+        rangeCondition.setUpperValue(to);
       }
       searchConditions.add(rangeCondition);
     }