Update comment about sending EndOfPublish (MystenLabs#15361)

## Description 

Describe the changes or additions included in this PR.

## Test Plan 

How did you test the new or updated feature?

---
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### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes

crates/sui-core/src/consensus_adapter.rs

@@ -824,6 +824,8 @@ impl ConsensusAdapter {
             // Note that there could be a race condition here where we enter this check in RejectAllCerts state.
             // In that case we don't need to send EndOfPublish because condition to enter
             // RejectAllCerts is when 2f+1 other validators already sequenced their EndOfPublish message.
+            // Also note that we could sent multiple EndOfPublish due to that multiple tasks can enter here with
+            // pending_count == 0. This doesn't affect correctness.
             if epoch_store
                 .get_reconfig_state_read_lock_guard()
                 .is_reject_user_certs()