Make Clone functions const.

Signed-off-by: Deukhoofd <Deukhoofd@gmail.com>

src/Battling/ScriptHandling/ScriptSet.hpp

@@ -15,7 +15,7 @@ namespace CreatureLib::Battling {
         static constexpr size_t defaultCapacity = 8;
         ScriptSet() : _scripts(defaultCapacity), _lookup(defaultCapacity){};
 
-        void Clone(ScriptSet& s) {
+        void Clone(ScriptSet& s) const {
             for (auto* script : _scripts) {
                 s.Add(script->Clone());
             }