Docs: Update link for Nautilus

Fixe: #1413

Author: zhanghai

README.md

@@ -24,7 +24,7 @@ An open source Material Design file manager, for Android 5.0+.
 - Archive support: View, extract and create common compressed files.
 - NAS support: View and manage files on FTP, SFTP, SMB and WebDAV servers.
 - Themes: Customizable UI colors, plus night mode with optional true black.
-- Linux-aware: Like [Nautilus](https://wiki.gnome.org/action/show/Apps/Files), knows symbolic links, file permissions and SELinux context.
+- Linux-aware: Like [Nautilus](https://apps.gnome.org/Nautilus/), knows symbolic links, file permissions and SELinux context.
 - Robust: Uses Linux system calls under the hood, not yet another [`ls` parser](https://news.ycombinator.com/item?id=7994720).
 - Well-implemented: Built upon the right things, including [Java NIO2 File API](https://docs.oracle.com/javase/8/docs/api/java/nio/file/package-summary.html) and [LiveData](https://developer.android.com/topic/libraries/architecture/livedata).