Update smb.mdx

Fix heading level

Author: silver886

src/content/docs/cloudflare-one/connections/connect-networks/use-cases/smb.mdx

@@ -77,7 +77,7 @@ The public hostname method can be implemented in conjunction with routing over W
 
 4. Select **Save**.
 
-## 2. (Recommended) Create an Access application
+### 2. (Recommended) Create an Access application
 
 By default, anyone on the Internet can connect to the server using the hostname of the published application. To allow or block specific users, create a [self-hosted application](/cloudflare-one/applications/configure-apps/self-hosted-public-app/) in Cloudflare Access.