🧹 doc: Filename consistency

Author: SaltyAom

docs/.vitepress/theme/index.ts

@@ -2,7 +2,7 @@
 import { h } from 'vue'
 import DefaultTheme from 'vitepress/theme'
 // @ts-ignore
-import Layout from '../../.vitepress/theme/Layout.vue'
+import Layout from '../../.vitepress/theme/layout.vue'
 import './custom.css'
 
 export default {