fix: doc content width in mobile device

Author: sanyuan0704

packages/island/src/theme-default/layout/DocLayout/index.tsx

@@ -54,7 +54,7 @@ export function DocLayout(props: DocLayoutProps) {
         ></SideMenu>
       ) : null}
       <div flex="~ 1 shrink-0" m="x-auto" className={`${styles.content}`}>
-        <div m="x-auto" flex="~ col">
+        <div m="x-auto" flex="~ col" className="max-w-100%">
           <div
             relative="~"
             m="x-auto"