Update nginx config in 404 templates

content/templates/404.md

@@ -50,7 +50,7 @@ Your 404.html file can be set to load automatically when a visitor enters a mist
 
 * [GitHub Pages](/hosting-and-deployment/hosting-on-github/). The 404 page is automatic.
 * Apache. You can specify `ErrorDocument 404 /404.html` in an `.htaccess` file in the root of your site.
-* Nginx. You might specify `error_page   404  =  /404.html;` in your `nginx.conf` file.
+* Nginx. You might specify `error_page 404 /404.html;` in your `nginx.conf` file.
 * Amazon AWS S3. When setting a bucket up for static web serving, you can specify the error file from within the S3 GUI.
 * Caddy Server. Using `errors { 404 /404.html }`. [Details here](https://caddyserver.com/docs/errors)