fix typo in JSON exporter

src/storm/storage/jani/JSONExporter.cpp

@@ -199,9 +199,9 @@ namespace storm {
             if (tbr.isStepBound()) {
                 opDecl["step-bounds"] = propertyInterval;
             } else if(tbr.isRewardBound()) {
-                opDecl["time-bounds"] = propertyInterval;
-            } else {
                 opDecl["reward-bounds"] = propertyInterval;
+            } else {
+                opDecl["time-bounds"] = propertyInterval;
             }
             return opDecl;
         }