Update website/src/pages/en/subgraphs/guides/agent0.mdx

Co-authored-by: Benoît Rouleau <1059139+benface@users.noreply.github.com>

Author: brandonleekramer

website/src/pages/en/subgraphs/guides/agent0.mdx

@@ -65,7 +65,7 @@ https://gateway.thegraph.com/api/<API_KEY>/subgraphs/id/<SUBGRAPH_ID>
 
 ### 3. Run a query
 
-**cURL**
+#### cURL
 
 ```bash
 curl -X POST \