Mark nix code blocks as containing nix code for syntax highlighting

README.md

@@ -38,11 +38,11 @@ This is exactly what we're doing to set the default deployment user to `colmena-
    ```
    Note: Nested keys don't seem to be compatible with sops-nix.
 5. Add the following entry to the modules of the hosts `nixosConfiguration`:
-   ```
+   ```nix
    sops-nix.nixosModules.sops
    ```
 6. Create a `sops.nix` in the hosts config directory containing the following content to include the `secrets.yaml`:
-   ```
+   ```nix
    { ... }:
 
    {
@@ -53,7 +53,7 @@ This is exactly what we're doing to set the default deployment user to `colmena-
    ```
 7. Make sure the `sops.nix` gets imported. For example in the `default.nix`.
 8. To use a secret stored under e.g. `forgejo_git_smtp_password`, you can then do something like the following:
-   ```
+   ```nix
    sops.secrets."forgejo_git_smtp_password" = {
      mode = "0440";
      owner = "forgejo";