Followup fix on official doc update (#34)

### What this PR does / why we need it?
- Fix typos: vllm-ascned --> vllm-ascend
- For version info

### Does this PR introduce _any_ user-facing change?
No


### How was this patch tested?
preview

Signed-off-by: Yikun Jiang <yikunkero@gmail.com>

README.md

@@ -33,7 +33,11 @@ By using vLLM Ascend plugin, popular open-source models, including Transformer-l
 ## Prerequisites
 
 - Hardware: Atlas 800I A2 Inference series, Atlas A2 Training series
-- Software: vLLM (the same version as vllm-ascned), Python >= 3.9, CANN >= 8.0.RC2, PyTorch >= 2.4.0, torch-npu >= 2.4.0
+- Software:
+  * Python >= 3.9
+  * CANN >= 8.0.RC2
+  * PyTorch >= 2.4.0, torch-npu >= 2.4.0
+  * vLLM (the same version as vllm-ascend)
 
 Find more about how to setup your environment step by step in [here](docs/installation.md).
 
@@ -64,7 +68,7 @@ Run the following command to start the vLLM server with the [Qwen/Qwen2.5-0.5B-I
 vllm serve Qwen/Qwen2.5-0.5B-Instruct
 curl http://localhost:8000/v1/models
 ```
-**Please refer to [Official Docs](./docs/index.md) for more details.**
+**Please refer to [official docs](./docs/index.md) for more details.**
 
 ## Contributing
 See [CONTRIBUTING](./CONTRIBUTING.md) for more details, which is a step-by-step guide to help you set up development environment, build and test.