Make heading shorter and adjust to Style Guide cURL templates

Author: RebeccaTamachiro

src/content/docs/byoip/address-maps/setup.mdx

@@ -59,17 +59,16 @@ Setting up a default SNI is currently only supported via API.
 3. Make sure you add the desired IPs to the address map. Cloudflare will respond with the default SNI on those IPs. Use the dashboard or refer to [Add An IP To An Address Map](/api/resources/addressing/subresources/address_maps/subresources/ips/methods/update/).
 4. Configure the `default_sni` value on the address map created in step 1. Refer to the [Update Address Map](/api/resources/addressing/subresources/address_maps/methods/edit/) API endpoint for details. The default SNI can be any valid domain or subdomain owned by your account.
 
-## Non-SNI support for Spectrum HTTPS applications
+### Spectrum HTTPS applications
 
 Default SNI for Spectrum can only be created via API using the [Create Address Map](/api/resources/addressing/subresources/address_maps/methods/create/) endpoint.
 
-The key is to not include any membership in your command. Your API command would resemble the following:
+Do not include any membership in your command. Your API command should resemble the following:
 
-```shell
-curl --request POST \
-  --url https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/addressing/address_maps \
-  --header 'authorization: Bearer $CLOUDFLARE_API_TOKEN' \
-  --header 'content-type: application/json' \
+```bash
+curl https://api.cloudflare.com/client/v4/accounts/$ACCOUNT_ID/addressing/address_maps \
+  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
+  --header "Content-Type: application/json" \
   --data '{
   "description": "default_sni",
   "default_sni": "sni.example.com",