Add dnf plugin info

Plugins.md

@@ -414,6 +414,30 @@ Currently the max history size is 100. The navigation should work for xterm, PuT
 
 ---
 
+## dnf
+
+**Maintainer:** [robbyrussell](https://github.com/robbyrussell)
+
+| Alias | Command                 | Description              |
+|-------|-------------------------|--------------------------|
+| dnfl  | `dnf list`              | List packages            |
+| dnfli | `dnf list installed`    | List installed packages  |
+| dnfgl | `dnf grouplist`         | List package groups      |
+| dnfmc | `dnf makecache`         | Generate metadata cache  |
+| dnfp  | `dnf info`              | Show package information |
+| dnfs  | `dnf search`            | Search package           |
+| **Use `sudo`**                                             |
+| dnfu  | `sudo dnf upgrade`      | Upgrade package          |
+| dnfi  | `sudo dnf install`      | Install package          |
+| dnfgi | `sudo dnf groupinstall` | Install package group    |
+| dnfr  | `sudo dnf remove`       | Remove package           |
+| dnfgr | `sudo dnf groupremove`  | Remove package group     |
+| dnfc  | `sudo dnf clean all`    | Clean cache              |
+
+See the [README](https://github.com/robbyrussell/oh-my-zsh/blob/master/plugins/dnf/) for more information.
+
+---
+
 ## docker
 
 **Maintainer:** [Azaan](http://github.com/AeonAxan)