update tutorial/doc links for zero3 (#835)

README.md

@@ -31,6 +31,7 @@ information [here](https://innovation.microsoft.com/en-us/exploring-ai-at-scale)
 
 
 # News
+* [2021/03/08] [ZeRO-3 Offload: Scale your models to trillion parameters without code changes while leveraging both CPUs & GPUs](https://www.deepspeed.ai/news/2021/03/07/zero3-offload.html)
 * [2020/11/12] [Simplified install, JIT compiled ops, PyPI releases, and reduced dependencies](#installation)
 * [2020/11/10] [Efficient and robust compressed training through progressive layer dropping](https://www.deepspeed.ai/news/2020/10/28/progressive-layer-dropping-news.html)
 * [2020/09/10] [DeepSpeed v0.3: Extreme-scale model training for everyone](https://www.microsoft.com/en-us/research/blog/deepspeed-extreme-scale-model-training-for-everyone/)

docs/_posts/2021-03-08-zero3-offload.md

@@ -95,6 +95,6 @@ If you are already a DeepSpeed user, you can find our detailed tutorial on ZeRO-
 
 * DeepSpeed: [Getting Started Page](/getting-started/)
 
-* ZeRO-3 Offload [Tutorial]() 
+* ZeRO-3 Offload [Documentation](https://deepspeed.readthedocs.io/en/latest/zero3.html), [Tutorial](tutorials/zero/#training-trillion-scale-models-with-zero-3-offload)
 
 The DeepSpeed Team is very excited to share ZeRO-3 Offload with the DL community.

docs/index.md

@@ -28,6 +28,7 @@ initiative to enable next-generation AI capabilities at scale, where you can fin
 information [here](https://innovation.microsoft.com/en-us/exploring-ai-at-scale).
 
 # What's New?
+* [2021/03/08] [ZeRO-3 Offload: Scale your models to trillion parameters without code changes while leveraging both CPUs & GPUs](https://www.deepspeed.ai/news/2021/03/07/zero3-offload.html)
 * [2020/11/12] [Simplified install, JIT compiled ops, PyPI releases, and reduced dependencies](#installation)
 * [2020/11/10] [Efficient and robust compressed training through progressive layer dropping](https://www.deepspeed.ai/news/2020/10/28/progressive-layer-dropping-news.html)
 * [2020/09/10] [DeepSpeed v0.3: Extreme-scale model training for everyone]({{ site.press_release_v3 }})