refactor: remove protocol

Author: Siumauricio

apps/docs/content/docs/core/registry/ghcr.mdx

@@ -14,6 +14,6 @@ To configure a GitHub Container Registry, you need to fill the form with the fol
 7. Click on `Create`.
 8. Copy the `access token` and paste it in Dokploy Modal as a Password field.
 9. (Optional) If you pretend to use Cluster Feature, make sure to set a `Image Prefix`.
-10. Registry URL: set `https://ghcr.io`
+10. Registry URL: set `ghcr.io`
 11. Click on `Test` to make sure everything is working.
 12. Click on `Create` to save the registry.