Update existing-delegate.md

Update for Season 5

src/docs/governance/existing-delegate.md

@@ -9,11 +9,10 @@ As a delegate, you should:
 
 - Join the conversation in the below channels in our [Discord](https://discord-gateway.optimism.io/):
   - [#gov-general](https://discord.com/channels/667044843901681675/968498307913637919): This channel is for general governance discussions.
-  - [#grants](https://discord.com/channels/667044843901681675/1069653708369047623): This channel is for discussion about the grants process and for delegates to provide feedback to grant applicants
-  - [#delegate-discussion](https://discord.com/channels/667044843901681675/989611992295813241): If you are a delegate with more than 0.5% delegated voting power, join the conversation with other larger delegates to discuss proposals & the governance process.
+  - [#delegate-discussion](https://discord.com/channels/667044843901681675/989611992295813241): If you are a Top 100 delegate, join the conversation with other larger delegates to discuss proposals & the governance process. You can check your ranking [here](https://dune.com/optimismfnd/optimism-op-token-house)
 
 - Provide feedback on draft proposals in the [Proposals Discussion](https://gov.optimism.io/c/proposals/38) section of the Forum
-     - If you have more than 0.5% of voting supply then you can also approve non-grant proposals.
+     - If you are a Top 100 delegate then you can also approve non-grant proposals. You can check your ranking [here](https://dune.com/optimismfnd/optimism-op-token-house).
        Non-grant proposals need at least 4 approvals to move to a vote. 
        To approve a proposal post this phrase in a forum comment on Discourse:
        > **I am an Optimism delegate with sufficient voting power and I believe this proposal is ready to move to a vote.**