docs: make OFTC upper case

README.md

@@ -48,7 +48,7 @@ Contact
 -------
 
 You can chat with us on IRC in the channel [#home-manager][] on
-[oftc][].
+[OFTC][].
 
 Installation
 ------------
@@ -380,7 +380,7 @@ an issue.
 [manual]: https://nix-community.github.io/home-manager/
 [configuration options]: https://nix-community.github.io/home-manager/options.html
 [#home-manager]: https://webchat.oftc.net/?channels=home-manager
-[oftc]: https://oftc.net/
+[OFTC]: https://oftc.net/
 [samueldr]: https://github.com/samueldr/
 [Nix Pills]: https://nixos.org/nixos/nix-pills/
 [Nix Flakes]: https://nixos.wiki/wiki/Flakes