fix: update tagline in documentation for clarity

Author: pascalinthecloud

docs/src/content/docs/index.mdx

@@ -3,7 +3,7 @@ title: terraform-proxmox-talos-cluster
 description: A Terraform module for provisioning a Kubernetes cluster on Proxmox using Talos Linux.
 template: splash
 hero:
-  tagline: Congrats on setting up a new Starlight project!
+  tagline: A Terraform module for provisioning a Kubernetes cluster on Proxmox using Talos Linux!
   image:
     file: ../../assets/houston.webp
   actions: