Update best-practices.mdx

Author: jayantk

pages/entropy/best-practices.mdx

@@ -15,7 +15,7 @@ to submit the necessary transactions.
 
 The gas limit for each chain is listed on the [contract addresses](./contract-addresses) page.
 
-## Handling Callback Failures
+## Handling callback failures
 
 While the default entropy provider is highly reliable, in rare cases a callback might not be received. This typically happens when there's an issue with your contract's callback implementation rather than with the provider itself. The most common causes are: