bump nixos-stable/nixos-unstable

Author: Mic92

tests/flake.lock

@@ -3,7 +3,7 @@
 
   inputs = {
     nixos-unstable-small.url = "git+https://github.com/NixOS/nixpkgs?shallow=1&ref=nixos-unstable-small";
-    nixos-stable.url = "git+https://github.com/NixOS/nixpkgs?shallow=1&ref=nixos-24.11";
+    nixos-stable.url = "git+https://github.com/NixOS/nixpkgs?shallow=1&ref=nixos-25.05";
     # override in the test
     nixos-hardware.url = "github:NixOS/nixos-hardware";
     flake-parts.url = "github:hercules-ci/flake-parts";