Update README.md

Add OD API announcement

Author: jaeyounkim

README.md

@@ -10,14 +10,13 @@ can take full advantage of TensorFlow for their research and product development
 | [official](official) | • A collection of example implementations for SOTA models using the latest TensorFlow 2's high-level APIs<br />• Officially maintained, supported, and kept up to date with the latest TensorFlow 2 APIs by TensorFlow<br />• Reasonably optimized for fast performance while still being easy to read |
 | [research](research) | • A collection of research model implementations in TensorFlow 1 or 2 by researchers<br />• Maintained and supported by researchers |
 | [community](community) | • A curated list of the GitHub repositories with machine learning models and implementations powered by TensorFlow 2 |
-| [orbit](orbit) | A flexible, lightweight library that users can easily use or fork when writing customized training loop code in TensorFlow 2.x. It seamlessly integrates with `tf.distribute` and supports running on different device types (CPU, GPU, and TPU). |
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+| [orbit](orbit) | • A flexible and lightweight library that users can easily use or fork when writing customized training loop code in TensorFlow 2.x. It seamlessly integrates with `tf.distribute` and supports running on different device types (CPU, GPU, and TPU). |
 
 ## [Announcements](https://github.com/tensorflow/models/wiki/Announcements)
 
 | Date | News |
 |------|------|
+| July 10, 2020 | TensorFlow 2 meets the [Object Detection API](https://github.com/tensorflow/models/tree/master/research/object_detection) ([Blog](https://blog.tensorflow.org/2020/07/tensorflow-2-meets-object-detection-api.html)) |
 | June 30, 2020 | [SpineNet: Learning Scale-Permuted Backbone for Recognition and Localization](https://github.com/tensorflow/models/tree/master/official/vision/detection#train-a-spinenet-49-based-mask-r-cnn) released ([Tweet](https://twitter.com/GoogleAI/status/1278016712978264064)) |
 | June 17, 2020 | [Context R-CNN: Long Term Temporal Context for Per-Camera Object Detection](https://github.com/tensorflow/models/tree/master/research/object_detection#june-17th-2020) released ([Tweet](https://twitter.com/GoogleAI/status/1276571419422253057)) |
 | May 21, 2020 | [Unifying Deep Local and Global Features for Image Search (DELG)](https://github.com/tensorflow/models/tree/master/research/delf#delg) code released |
@@ -26,12 +25,6 @@ can take full advantage of TensorFlow for their research and product development
 | May 1, 2020 | [DELF: DEep Local Features](https://github.com/tensorflow/models/tree/master/research/delf) updated to support TensorFlow 2.1 |
 | March 31, 2020 | [Introducing the Model Garden for TensorFlow 2](https://blog.tensorflow.org/2020/03/introducing-model-garden-for-tensorflow-2.html) ([Tweet](https://twitter.com/TensorFlow/status/1245029834633297921)) |
 
-## [Milestones](https://github.com/tensorflow/models/milestones)
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-| Date | Milestone |
-|------|-----------|
-| July 8, 2020 | [![GitHub milestone](https://img.shields.io/github/milestones/progress/tensorflow/models/1)](https://github.com/tensorflow/models/milestone/1) |
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 ## Contributions
 
 [![help wanted:paper implementation](https://img.shields.io/github/issues/tensorflow/models/help%20wanted%3Apaper%20implementation)](https://github.com/tensorflow/models/labels/help%20wanted%3Apaper%20implementation)