Add changelog info for 1.5.2

Signed-off-by: Tim Beiko <t.beiko23@gmail.com>

CHANGELOG.md

@@ -1,5 +1,21 @@
 # Changelog
 
+## 1.5.2 
+
+### Additions and Improvements
+
+### Bug Fixes
+
+#### Previously identified known issues
+ 
+- [Scope of logs query causing Besu to hang](KNOWN_ISSUES.md#scope-of-logs-query-causing-besu-to-hang)
+- [Logs queries missing results against chain head](KNOWN_ISSUES.md#Logs-queries-missing-results-against-chain-head)
+- [Eth/65 loses peers](KNOWN_ISSUES.md#eth65-loses-peers)
+- [Fast sync when running Besu on cloud providers](KNOWN_ISSUES.md#fast-sync-when-running-besu-on-cloud-providers)
+- [Privacy users with private transactions created using v1.3.4 or earlier](KNOWN_ISSUES.md#privacy-users-with-private-transactions-created-using-v134-or-earlier)
+- [Permissioning issues on Kubernetes](KNOWN_ISSUES.md#Kubernetes-permissioning-uses-Service-IPs-rather-than-pod-IPs-which-can-fail)
+- [Restarts caused by insufficient memory can cause inconsistent private state](KNOWN_ISSUES.md#Restart-caused-by-insufficient-memory-can-cause-inconsistent-private-state)
+
 ## 1.5.1
 
 ### Deprecated 

KNOWN_ISSUES.md

@@ -9,9 +9,15 @@ Known issues are open issues categorized as [Very High or High impact](https://w
 
 [`eth_getLogs` queries that are too large or too broad can cause Besu to never return](https://github.com/hyperledger/besu/issues/944). 
 
-Workaround - Limit the number of blocks queried by each `eth_getLogs` call.
+Workaround -> Limit the number of blocks queried by each `eth_getLogs` call.
 
-A fix for this issue is being actively worked on.
+## Logs queries missing results against chain head
+
+When using `eth_getLogs` against the head of Goerli to retrieve Eth2 deposit log events, [some results seem to be missing](https://github.com/hyperledger/besu/issues/1153). 
+
+Workaround -> Use `eth_getLogs` against historical blocks rather than the chain head directly. 
+
+A fix for this issue is actively being worked on. 
 
 ## Eth/65 loses peers