Fix: const auto& for file reference in showPluginMenu loop

Source/PluginBridgeEditor.cpp

@@ -107,14 +107,13 @@ void PluginBridgeEditor::showPluginMenu()
         return;
     }
 
-    // Group: VST3 submenu and AU submenu
     juce::PopupMenu vst3Menu;
     juce::PopupMenu auMenu;
     int itemId = 1;
 
     for (int i = 0; i < files.size(); ++i)
     {
-        auto& file = files[i];
+        const auto& file = files[i];
         auto name = file.getFileNameWithoutExtension();
 
         if (file.getFileExtension() == ".vst3")