[doc] update pytorch version in documents. (#5177)

* fix

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* test ci

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* update pytorch version in documents

README.md

@@ -372,7 +372,7 @@ Please visit our [documentation](https://www.colossalai.org/) and [examples](htt
 ## Installation
 
 Requirements:
-- PyTorch >= 1.11 (PyTorch 2.x in progress)
+- PyTorch >= 1.11 and PyTorch <= 2.1
 - Python >= 3.7
 - CUDA >= 11.0
 - [NVIDIA GPU Compute Capability](https://developer.nvidia.com/cuda-gpus) >= 7.0 (V100/RTX20 and higher)

docs/README-zh-Hans.md

@@ -368,7 +368,7 @@ Colossal-AI 为您提供了一系列并行组件。我们的目标是让您的
 
 环境要求:
 
-- PyTorch >= 1.11 (PyTorch 2.x 正在适配中)
+- PyTorch >= 1.11 并且 PyTorch <= 2.1
 - Python >= 3.7
 - CUDA >= 11.0
 - [NVIDIA GPU Compute Capability](https://developer.nvidia.com/cuda-gpus) >= 7.0 (V100/RTX20 and higher)

docs/source/en/get_started/installation.md

 # Setup
 
 Requirements:
-- PyTorch >= 1.11 (PyTorch 2.x in progress)
+- PyTorch >= 1.11 and PyTorch <= 2.1
 - Python >= 3.7
 - CUDA >= 11.0
 - [NVIDIA GPU Compute Capability](https://developer.nvidia.com/cuda-gpus) >= 7.0 (V100/RTX20 and higher)

docs/source/zh-Hans/get_started/installation.md

@@ -2,7 +2,7 @@
 
 环境要求:
 
-- PyTorch >= 1.11 (PyTorch 2.x 正在适配中)
+- PyTorch >= 1.11 并且 PyTorch <= 2.1
 - Python >= 3.7
 - CUDA >= 11.0
 - [NVIDIA GPU Compute Capability](https://developer.nvidia.com/cuda-gpus) >= 7.0 (V100/RTX20 and higher)