Update website/src/pages/en/ai-suite/subgraph-skills/setup.mdx

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

Author: brandonleekramer

website/src/pages/en/ai-suite/subgraph-skills/setup.mdx

@@ -39,7 +39,7 @@ Performance best practices from The Graph docs:
 - Pruning with indexerHints
 - Arrays with `@derivedFrom`
 - Immutable entities and Bytes as IDs
-- Avoiding eth_calls
+- Avoiding `eth_calls`
 - Timeseries and aggregations
 - Grafting for hotfixes