为插件mirror_mcsmcdr添加英文介绍 (#390)

Author: tanhHeng

plugins/mirror_mcsmcdr/plugin_info.json

@@ -7,7 +7,8 @@
         }
     ],
     "introduction": {
-        "zh_cn": "README.md"
+        "zh_cn": "README.md",
+        "en_us": "README_en.md"
     },
     "repository": "https://github.com/LazyAlienServer/MirrorMcsmcdR",
     "branch": "main",