docs(intro): Use fednex's tagline from the website

docs/introduction.mdx

@@ -28,7 +28,7 @@ Head over to the [**Deploying chapter**](./deploying.mdx) to get started.
 
 If you want to try it out as a user, we have some [partnered homeservers](./community/ops-guidelines.mdx) you can use:
 
-**`federated.nexus`** - a community resource hosting FOSS services.
+**`federated.nexus`** - A community resource hosting multiple FOSS (especially federated) services.
 - Go to https://federated.nexus, click on "Apply to Join", and follow the prompts.
 - Once your request has been accepted, you will receive an email with your username and password, which you can use to sign in from any Matrix client.
 - Remember to change your password after logging in!