zaphyra's git: haumea

docs: fix grammar

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -8,7 +8,7 @@ Unless explicitly stated, all contributions are licensed under
 This doesn't apply to bug fixes.
 
 - Discuss before opening a pull request, so your work doesn't go to waste.
-  Anything from GitHub issues to Matrix discussions are fine.
+  Anything from GitHub issues to Matrix discussions is fine.
 - Update documentation accordingly. Everything in `haumea.lib` should to be documented.
 - Add [tests](tests) when necessary.
   Test your changes with `nix flake check`. Make sure new files are added to git.