Fix duplicate title in object storage docs (#264)

Fixes this

<img width="645" height="196" alt="Screenshot 2026-02-12 at 4 55 22 PM"
src="https://github.com/user-attachments/assets/37fcbe82-f5e2-47b1-8bd9-e2acfd1c3b09"
/>

Author: svix-lucho

docs/advanced-endpoints/object-storage.mdx

@@ -8,8 +8,6 @@ import HeaderWithCopyButton from '@site/src/components/HeaderWithCopyButton';
 
 <HeaderWithCopyButton title="Object Storage" sourceMarkdown={RAW} />
 
-# Object Storage Endpoints
-
 Svix supports sending messages directly to [AWS S3](https://aws.amazon.com/s3/), [Google Cloud Storage](https://cloud.google.com/storage) and [Azure Blob Storage](https://azure.microsoft.com/en-us/products/storage/blobs).
 
 This is useful for storing payloads in a cloud storage bucket without your customers having to set up any listener endpoint or write any glue code.