fix: htmlFallbackMiddleware for favicon (#15301)

Author: patak-dev

packages/vite/src/node/server/middlewares/htmlFallback.ts

@@ -16,6 +16,8 @@ export function htmlFallbackMiddleware(
     if (
       // Only accept GET or HEAD
       (req.method !== 'GET' && req.method !== 'HEAD') ||
+      // Exclude default favicon requests
+      req.url === '/favicon.ico' ||
       // Require Accept: text/html or */*
       !(
         req.headers.accept === undefined || // equivalent to `Accept: */*`