ci/codeowners-validator: fix typo in comment

split of from https://github.com/NixOS/nixpkgs/pull/413240 to avoid backporting that PR

Changed files
+1 -1
ci
codeowners-validator
+1 -1
ci/codeowners-validator/default.nix
···
})
# Undoes part of the above PR: We don't want to require write access
# to the repository, that's only needed for GitHub's native CODEOWNERS.
-
# Furthermore, it removes an unneccessary check from the code
+
# Furthermore, it removes an unnecessary check from the code
# that breaks tokens generated for GitHub Apps.
./permissions.patch
# Allows setting a custom CODEOWNERS path using the OWNERS_FILE env var