Replace F extension with string interpolation

OpenRA.Platforms.Default/Sdl2PlatformWindow.cs

@@ -349,7 +349,7 @@ namespace OpenRA.Platforms.Default
 			}
 			catch (Exception ex)
 			{
-				throw new Sdl2HardwareCursorException("Failed to create hardware cursor `{0}` - {1}".F(name, ex.Message), ex);
+				throw new Sdl2HardwareCursorException($"Failed to create hardware cursor `{name}` - {ex.Message}", ex);
 			}
 		}