更新迅雷链接正则，增加 thunderx 支持

增加 thunderx 支持，使用 \d 替换 0-9 更简洁

packages/www/src/RULES.js

@@ -2,7 +2,7 @@ module.exports = [
 
     {
         title: '迅雷链接',
-        rule: /^thunder:\/\/[a-zA-Z0-9]+=$/,
+        rule: /^thunderx?:\/\/[a-zA-Z\d]+=$/,
         examples: ['thunder://QUEsICdtYWduZXQ6P3h0PXVybjpidGloOjBCQTE0RTUxRkUwNjU1RjE0Qzc4NjE4RjY4NDY0QjZFNTEyNjcyOUMnWlo='],
     },
 
@@ -289,4 +289,4 @@ module.exports = [
         rule: /^[^A-Za-z]*$/,
         examples: ['你好6啊', '@¥()！']
     }
-];
+];