Add missing endpoints in readme

Author: prevostc

README.md

@@ -8,8 +8,13 @@ This Subgraph sources events from the Beefy contracts in different networks.
 
 ### Latest endpoints
 
+- [Arbitrum](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-arbitrum/latest/gn)
+- [Base](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-base/latest/gn)
+- [Bsc](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-bsc/latest/gn)
+- [Ethereum](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-ethereum/latest/gn)
 - [Linea](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-linea/latest/gn)
 - [Mode](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-mode/latest/gn)
+- [Optimism](https://api.goldsky.com/api/public/project_clu2walwem1qm01w40v3yhw1f/subgraphs/beefy-balances-optimism/latest/gn)
 
 # Contributing