flake: add disko installTest

Author: zowoq

flake.nix

@@ -146,6 +146,7 @@
               nixosTests-buildbot = pkgs.nixosTests.buildbot;
               nixosTests-buildbot-nix-master = inputs'.buildbot-nix.checks.master;
               nixosTests-buildbot-nix-worker = inputs'.buildbot-nix.checks.worker;
+              nixosTests-disko-installTest = self.nixosConfigurations.build01.config.system.build.installTest;
               nixosTests-hydra = pkgs.nixosTests.hydra.hydra;
             };
         };