[Doc][Misc] Improve readability and fix typos in documentation (#8340)

### What this PR does / why we need it?

This PR improves the readability of the documentation by fixing typos,
correcting command extensions, and fixing broken links in the Chinese
README.

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Documentation changes only.

---------

Signed-off-by: sunshine202600 <sunshine202600@163.com>

docs/source/developer_guide/evaluation/using_ais_bench.md

@@ -161,7 +161,7 @@ There are several arguments that you should update according to your environment
 - `path`: Update to your model weight path.
 - `model`: Update to your model name in vLLM.
 - `host_ip` and `host_port`: Update to your vLLM server ip and port.
-- `max_out_len`: Note `max_out_len` + LLM input length should be less than `max-model-len`(config in your vllm server), `32768` will be suitable for most datasets.
+- `max_out_len`: Note `max_out_len` + LLM input length should be less than `max_model_len`(config in your vllm server), `32768` will be suitable for most datasets.
 - `batch_size`: Update according to your dataset.
 - `temperature`: Update inference argument.
 

docs/source/developer_guide/evaluation/using_evalscope.md

@@ -65,7 +65,7 @@ pip install gradio plotly evalscope
 
 ## 3. Run GSM8K using EvalScope for accuracy testing
 
-You can use `evalscope eval` to run GSM8K for accuracy testing:
+You can use `evalscope eval` to run GSM8K (a grade-school math benchmark dataset) for accuracy testing:
 
 ```shell
 evalscope eval \

docs/source/developer_guide/evaluation/using_lm_eval.md

@@ -43,7 +43,7 @@ INFO:     Waiting for application startup.
 INFO:     Application startup complete.
 ```
 
-### 2. Run GSM8K using lm-eval for accuracy testing
+### 2. Run GSM8K using the vLLM server (curl) and then run lm-eval for accuracy testing
 
 You can query the result with input prompts:
 

docs/source/developer_guide/evaluation/using_opencompass.md

@@ -53,7 +53,7 @@ curl http://localhost:8000/v1/completions \
     }'
 ```
 
-## 2. Run C-Eval using OpenCompass for accuracy testing
+## 2. Run C-Eval (a Chinese language model evaluation benchmark) using OpenCompass for accuracy testing
 
 Install OpenCompass and configure the environment variables in the container: