fix(@angular/build): serve HTML files directly

Ensure direct requests to HTML files result in them being served.

Closes angular#28063

packages/angular/build/src/tools/vite/middlewares/assets-middleware.ts

@@ -66,7 +66,7 @@ export function createAngularAssetsMiddleware(
     // Resource files are handled directly.
     // Global stylesheets (CSS files) are currently considered resources to workaround
     // dev server sourcemap issues with stylesheets.
-    if (extension !== '.js' && extension !== '.html') {
+    if (extension !== '.js') {
       const outputFile = outputFiles.get(pathname);
       if (outputFile?.servable) {
         const mimeType = lookupMimeType(extension);