Fix Unicode punctuation, update model versions and correct content issues

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

03_install/3.4_centos.md

@@ -56,14 +56,10 @@ $ sudo dnf config-manager \
 
 $ sudo sed -i 's/download.docker.com/mirrors.aliyun.com\/docker-ce/g' /etc/yum.repos.d/docker-ce.repo
 
-## 官方源
-
-## $ sudo dnf config-manager \
-
-##     --add-repo \
-
-##     https://download.docker.com/linux/centos/docker-ce.repo
-
+# 官方源
+# $ sudo dnf config-manager \
+#     --add-repo \
+#     https://download.docker.com/linux/centos/docker-ce.repo
 ```
 
 如果需要测试版本的 Docker 请执行以下命令：