chore: Extend comment about Nix version

Author: Techassi

config/versions.yaml

@@ -25,5 +25,9 @@ hadolint_version: v2.12.0
 python_version: 3.12
 
 # This Nix version is used in the operators pre-commit workflow as they require
-# Nix to run some checks.
+# Nix to run some checks. Places to check for versions:
+# - https://github.com/NixOS/nix/tags
+# - https://nixos.org/download/#
+# Usually the latest version should just work and as such the version here can
+# be bumped without any constraints.
 nix_pkg_manager_version: 2.28.3