make CylindricalStorageInputCopyBuilder protected

Author: danielfeismann

src/main/java/edu/ie3/datamodel/models/input/thermal/CylindricalStorageInput.java

@@ -169,7 +169,7 @@ public static class CylindricalStorageInputCopyBuilder
     private ComparableQuantity<SpecificHeatCapacity> c;
     private ComparableQuantity<Power> pThermalMax;
 
-    CylindricalStorageInputCopyBuilder(CylindricalStorageInput entity) {
+    protected CylindricalStorageInputCopyBuilder(CylindricalStorageInput entity) {
       super(entity);
       this.storageVolumeLvl = entity.getStorageVolumeLvl();
       this.inletTemp = entity.getInletTemp();