autopublish nixos, fixed names

.forgejo/workflows/iso-nixos-installer.yaml

@@ -7,9 +7,9 @@ jobs:
       - run: nix build ./installer
       - name: Publish release if ISO changed
         env:
-          TOKEN: ${{ gitea.token }}
-          SERVER: ${{ gitea.server_url }}
-          REPO: ${{ gitea.repository }}
+          TOKEN: ${{ forgejo.token }}
+          SERVER: ${{ forgejo.server_url }}
+          REPO: ${{ forgejo.repository }}
         run: |
           ISO="result/iso/mirea-nixos-installer.iso"
           NEW_SHA=$(sha256sum "$ISO" | awk '{print $1}')