grafana.nix: Formatting/white space/putting things in their right name space

This commit does not change the semantics, only the looks.

nixos/modules/monitoring/server/grafana.nix

@@ -81,14 +81,13 @@ in {
         # Defend against DNS rebinding attacks.
         SERVER_ENFORCE_DOMAIN = "true";
       };
-    };
 
-    services.grafana.auth = {
+      auth = {
         anonymous.org_role = "Admin";
         anonymous.org_name = "Main Org.";
       } // grafanaAuth;
 
-    services.grafana.provision = {
+      provision = {
         enable = true;
         # See https://grafana.com/docs/grafana/latest/administration/provisioning/#datasources
         datasources = [{
@@ -109,6 +108,7 @@ in {
           options.path = ./grafana-config;
         }];
       };
+    };
 
     # nginx reverse proxy
     security.acme.email = cfg.letsEncryptAdminEmail;