fix: reference to config

Signed-off-by: giac-mysten <[email protected]>

docs/walrus-sites/builder-config.md

@@ -10,9 +10,9 @@ here the details for all the configuration options.
 
 ## Minimal configuration
 
-The config file is expected to be in `./builder.yaml`, and it is possible to point elsewhere with
-the `--config` flag. For your first run, it should be sufficient to call the `site-builder` with
-`--config site-builder/assets/builder-example.yaml`, which is already configured appropriately.
+The config file is expected to be in `./sites-config.yaml`, and it is possible to point elsewhere
+with the `--config` flag. For your first run, it should be sufficient to call the `site-builder`
+with `--config sites-config.yaml`, which is already configured appropriately.
 
 If, for any reason, you didn't add `walrus` to `$PATH`, make sure to configure a pointer to the
 binary, see below.