Fixing broken link (#10432)

Author: AsherBarak

research/object_detection/g3doc/using_your_own_dataset.md

@@ -3,7 +3,7 @@
 [TOC]
 
 To use your own dataset in TensorFlow Object Detection API, you must convert it
-into the [TFRecord file format](https://www.tensorflow.org/api_guides/python/python_io#tfrecords_format_details).
+into the [TFRecord file format](https://www.tensorflow.org/tutorials/load_data/tfrecord).
 This document outlines how to write a script to generate the TFRecord file.
 
 ## Label Maps