fix: check file:// not file:

Co-authored-by: patak <[email protected]>

Author: hi-ogawa

packages/vite/src/node/plugins/css.ts

@@ -1096,7 +1096,7 @@ function createCSSResolvers(config: ResolvedConfig): CSSAtImportResolvers {
         })
         sassResolve = async (...args) => {
           const id = args[0]
-          if (id.startsWith('file:')) {
+          if (id.startsWith('file://')) {
             const fileUrl = new URL(id)
             if (fs.existsSync(fileUrl)) {
               return fileURLToPath(fileUrl)