Fix config access permissions (#671)

CHANGELIST.md

@@ -15,6 +15,7 @@
 - Update packages to latest
 - Enable LibIRD for all .NET frameworks (Deterous)
 - Try updating PR check action
+- Fix config access persmission (Deterous)
 
 ### 3.1.2 (2024-02-27)
 

MPF.Core/Utilities/OptionsLoader.cs

@@ -272,7 +272,8 @@ namespace MPF.Core.Utilities
             }
 
             var serializer = JsonSerializer.Create();
-            var reader = new StreamReader(ConfigurationPath);
+            var stream = File.Open(ConfigurationPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
+            var reader = new StreamReader(stream);
             var settings = serializer.Deserialize(reader, typeof(Dictionary<string, string?>)) as Dictionary<string, string?>;
             return new Options(settings);
         }