docs: provisioning: Added NixOS module link. (#77273)

docs/sources/administration/provisioning/index.md

@@ -60,12 +60,13 @@ If you have a literal `$` in your value and want to avoid interpolation, `$$` ca
 Currently we do not provide any scripts/manifests for configuring Grafana. Rather than spending time learning and creating scripts/manifests for each tool, we think our time is better spent making Grafana easier to provision. Therefore, we heavily rely on the expertise of the community.
 
 | Tool      | Project                                                                                                                         |
-| --------- | -------------------------------------------------------------------------------------------------------------- |
+| --------- | ------------------------------------------------------------------------------------------------------------------------------- |
 | Puppet    | [https://forge.puppet.com/puppet/grafana](https://forge.puppet.com/puppet/grafana)                                              |
 | Ansible   | [https://github.com/grafana/grafana-ansible-collection](https://github.com/grafana/grafana-ansible-collection)                  |
 | Chef      | [https://github.com/sous-chefs/chef-grafana](https://github.com/sous-chefs/chef-grafana)                                        |
 | Saltstack | [https://github.com/salt-formulas/salt-formula-grafana](https://github.com/salt-formulas/salt-formula-grafana)                  |
 | Jsonnet   | [https://github.com/grafana/grafonnet-lib/](https://github.com/grafana/grafonnet-lib/)                                          |
+| NixOS     | [services.grafana.provision module](https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/monitoring/grafana.nix) |
 
 ## Data sources