Update fly-io.mdx

Author: Xe

docs/blueprints/model-storage/fly-io.mdx

@@ -135,7 +135,7 @@ as the `workload-keypair` in this tutorial.
 [Limit the scope of this access key](/docs/blueprints/limited-access-key) to
 only your `model-storage` and `generated-images` buckets.
 
-## Deploying it to Vast.ai
+## Deploying it to Fly.io
 
 <details>
 <summary>Optional: building your own image</summary>