Updated link https://apps.gnome.org/DejaDup/ (#854)

README.md

@@ -325,7 +325,7 @@ _For a more comprehensive/advanced/better categorized/... list of Linux audio so
 - [![Open-Source Software][oss icon]](https://github.com/bit-team/backintime/) [Back In Time](https://github.com/bit-team/backintime/) - A simple backup tool for Linux, inspired by "flyback project".
 - [![Open-Source Software][oss icon]](https://borgbackup.readthedocs.io/en/stable/development.html) [BorgBackup](https://borgbackup.readthedocs.io/en/stable/) - A deduplicating backup program with compression and authenticated encryption.
 - [![Open-Source Software][oss icon]](https://github.com/bup/bup) [bup](https://bup.github.io/) - Very efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images).
-- [![Open-Source Software][oss icon]](https://gitlab.gnome.org/World/deja-dup) [Deja Dup](https://wiki.gnome.org/Apps/DejaDup) - A simple backup tool with built-in encryption.
+- [![Open-Source Software][oss icon]](https://gitlab.gnome.org/World/deja-dup) [Deja Dup](https://apps.gnome.org/DejaDup/) - A simple backup tool with built-in encryption.
 - [![Open-Source Software][oss icon]](https://github.com/gilbertchen/duplicacy) [Duplicacy](https://duplicacy.com/) - Duplicacy is a new generation cross-platform cloud backup tool based on the idea of Lock-Free Deduplication. CLI version is free for personal use and is open-source, GUI and commercial use require licensing.
 - [![Open-Source Software][oss icon]](https://gitlab.com/duplicity/duplicity) [Duplicity](https://duplicity.gitlab.io/) - Duplicity does directory backups by producing encrypted tar-format volumes and uploading them to a remote or local file server.
 - [![Open-Source Software][oss icon]](https://www.freefilesync.org/download.php) [FreeFileSync](https://www.freefilesync.org) - FreeFileSync is a folder comparison and synchronization software that creates and manages backup copies of all your important files. Instead of copying every file every time, FreeFileSync determines the differences between a source and a target folder and transfers only the minimum amount of data needed.