fix(docs): update pip install command in README files

README.md

@@ -233,7 +233,7 @@ Test Version (Synced with dev branch updates, testing new features):
 ```bash
 conda create -n MinerU python=3.10
 conda activate MinerU
-pip install -U magic-pdf[full] --extra-index-url https://wheels.myhloli.com
+pip install -U "magic-pdf[full]" --extra-index-url https://wheels.myhloli.com
 ```
 
 #### 2. Download model weight files

README_zh-CN.md

@@ -239,7 +239,7 @@ https://github.com/user-attachments/assets/4bea02c9-6d54-4cd6-97ed-dff14340982c
 ```bash
 conda create -n MinerU python=3.10
 conda activate MinerU
-pip install -U magic-pdf[full] --extra-index-url https://wheels.myhloli.com -i https://mirrors.aliyun.com/pypi/simple
+pip install -U "magic-pdf[full]" --extra-index-url https://wheels.myhloli.com -i https://mirrors.aliyun.com/pypi/simple
 ```
 
 #### 2. 下载模型权重文件