fix: update outdated hasura URL

Author: PaulRBerg

docs/api/01-overview.mdx

@@ -31,7 +31,7 @@ open-sourced some of them.
 
 To preview the GraphQL APIs for subgraphs and indexers, you can plug them into
 [Hasura's](https://cloud.hasura.io/public/graphiql) online explorer.
-[Here](https://cloud.hasura.io/public/graphiql?endpoint=https://api.studio.thegraph.com/query/57079/sablier-v2/version/latest)'s
+[Here](https://cloud.hasura.io/public/graphiql?endpoint=https://api.studio.thegraph.com/query/57079/sablier-ethereum-lockup/version/latest)'s
 an example setup of a Mainnet subgraph for Sablier Lockup.
 
 :::