wip: change workflows checkout action to self hosted version

.gitea/workflows/ci.yaml

@@ -11,10 +11,10 @@ jobs:
   build:all:
     runs-on: native
     steps:
-      - uses: https://jungle.bsc.es/git/abonerib/checkout.git@v6-gitea
+      - uses: actions/checkout@v6-gitea
       - run: nix build -L --no-link --print-out-paths .#bsc.ci.all
   build:cross:
     runs-on: native
     steps:
-      - uses: https://jungle.bsc.es/git/abonerib/checkout.git@v6-gitea
+      - uses: actions/checkout@v6-gitea
       - run: nix build -L --no-link --print-out-paths .#bsc.ci.cross

flake.nix

@@ -3,8 +3,6 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
   };
 
-  description = "configuration for jungle machines";
-
   outputs = { self, nixpkgs, ... }:
 let
   mkConf = name: nixpkgs.lib.nixosSystem {