chore: use lima from unstable

Author: refnode

users/refnode/common/optional/vm.nix

@@ -4,6 +4,6 @@
   # Virtual machine and container tools for macOS
 
   home.packages = with pkgs; [
-    lima  # Linux virtual machines on macOS
+    unstable.lima  # Linux virtual machines on macOS
   ];
-}
+}