Replace F extension with string interpolation

OpenRA.Mods.Common/Scripting/Properties/CaptureProperties.cs

@@ -33,7 +33,7 @@ namespace OpenRA.Mods.Common.Scripting
 		{
 			var targetManager = target.TraitOrDefault<CaptureManager>();
 			if (targetManager == null || !targetManager.CanBeTargetedBy(target, Self, captureManager))
-				throw new LuaException("Actor '{0}' cannot capture actor '{1}'!".F(Self, target));
+				throw new LuaException($"Actor '{Self}' cannot capture actor '{target}'!");
 
 			// NB: Scripted actions get no visible targetlines.
 			Self.QueueActivity(new CaptureActor(Self, Target.FromActor(target), null));