ci(docker): 简化创建sources.list的步骤

使用echo命令替代here文档来创建sources.list文件，使代码更简洁

.gitea/workflows/docker.yml

@@ -86,11 +86,9 @@ jobs:
             sed -i 's|http://security.debian.org|https://deb.debian.org|g' /etc/apt/sources.list
           else
             echo "创建新的 sources.list..."
-            cat > /etc/apt/sources.list << EOF
+            echo "deb https://deb.debian.org/debian bookworm main" > /etc/apt/sources.list
-deb https://deb.debian.org/debian bookworm main
+            echo "deb https://deb.debian.org/debian bookworm-updates main" >> /etc/apt/sources.list
-deb https://deb.debian.org/debian bookworm-updates main
+            echo "deb https://deb.debian.org/debian-security bookworm-security main" >> /etc/apt/sources.list
-deb https://deb.debian.org/debian-security bookworm-security main
-EOF
           fi
           echo "当前软件源配置:"
           cat /etc/apt/sources.list