doc: use discord.com instead of discordapp.com

.github/CONTRIBUTING.md

@@ -33,7 +33,7 @@ There are two places where to request features or report bugs:
 ### Discord Server
 If you do not have a GitHub account or want to discuss a feature or bug with us before making an issue, you can join our Discord server.
 
-<a href="https://discord.movie-web.app"><img src="https://discordapp.com/api/guilds/871713465100816424/widget.png?style=banner2" alt="Discord Server"></a>
+<a href="https://discord.movie-web.app"><img src="https://discord.com/api/guilds/871713465100816424/widget.png?style=banner2" alt="Discord Server"></a>
 
 ### GitHub Issues
 To make a GitHub issue for movie-web, please visit the [new issue page](https://github.com/movie-web/movie-web/issues/new/choose) where you can pick either the "Bug Report" or "Feature Request" template.

README.md

@@ -5,7 +5,7 @@
 <a href="https://github.com/movie-web/movie-web/blob/master/LICENSE.md"><img alt="GitHub license" src="https://img.shields.io/github/license/movie-web/movie-web?style=flat-square"></a>
 <a href="https://github.com/movie-web/movie-web/network"><img alt="GitHub forks" src="https://img.shields.io/github/forks/movie-web/movie-web?style=flat-square"></a>
 <a href="https://github.com/movie-web/movie-web/stargazers"><img alt="GitHub stars" src="https://img.shields.io/github/stars/movie-web/movie-web?style=flat-square"></a><br/>
-<a href="https://discord.movie-web.app"><img src="https://discordapp.com/api/guilds/871713465100816424/widget.png?style=banner2" alt="Discord Server"></a>
+<a href="https://discord.movie-web.app"><img src="https://discord.com/api/guilds/871713465100816424/widget.png?style=banner2" alt="Discord Server"></a>
 </p>
 
 movie-web is a web app for watching movies easily. Check it out at **[movie-web.app](https://movie-web.app)**.