Revert changes

Author: Jack251970

Flow.Launcher.Core/Plugin/PluginManager.cs

@@ -47,10 +47,10 @@ public static class PluginManager
         /// <summary>
         /// Directories that will hold Flow Launcher plugin directory
         /// </summary>
-        public static string[] Directories =>
-        [
+        public static readonly string[] Directories =
+        {
             Constant.PreinstalledDirectory, DataLocation.PluginsDirectory
-        ];
+        };
 
         private static void DeletePythonBinding()
         {