fix(ASFFreeGamesOptions): Ensure correct file size when saving config…

…uration

- Updated `Save` method to address potential issue with file size after writing JSON data.
- Implemented option to set file size explicitly after writing using `fs.SetLength(fs.Position)`.

This change prevents potential corruption in the saved configuration file by ensuring the correct size reflects the actual JSON content.

ASFFreeGames/Configurations/ASFFreeGamesOptionsLoader.cs

@@ -61,6 +61,7 @@ public static async Task Save(ASFFreeGamesOptions options, CancellationToken can
 
 			// Use JsonSerializerOptions.PropertyNamingPolicy to specify the JSON property naming convention
 			await JsonSerializer.SerializeAsync(fs, options, cancellationToken: cancellationToken).ConfigureAwait(false);
+			fs.SetLength(fs.Position);
 		}
 		finally {
 			Semaphore.Release();