fix button format

Author: vy-ton

src/content/docs/d1/best-practices/read-replication.mdx

@@ -14,7 +14,9 @@ Your application can use read replicas with D1 [Sessions API](/d1/worker-api/d1-
 
 To checkout D1 read replication and Sessions API:
 
-1. [![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/lambrospetrou/d1-starter-sessions-api) the following Worker code, which will prompt you to create a D1 database.
+1.  Deploy the following Worker code, which will prompt you to create a D1 database.
+
+[![Deploy to Cloudflare](https://deploy.workers.cloudflare.com/button)](https://deploy.workers.cloudflare.com/?url=https://github.com/lambrospetrou/d1-starter-sessions-api)
 
 2. Enable read replication on the just created D1 database: