chore(CHANGELOG): update v3.5 and v3.6 changelog to reflect Endpoint.Metadata

deprecation

Signed-off-by: amosehiguese <[email protected]>

Author: amosehiguese

CHANGELOG/CHANGELOG-3.5.md

@@ -6,6 +6,10 @@ Previous change logs can be found at [CHANGELOG-3.4](https://github.com/etcd-io/
 
 ## v3.5.22 (TBC)
 
+### Deprecations
+
+- [Deprecated the Metadata field in the Endpoint struct from the client/v3/naming/endpoints package ](https://github.com/etcd-io/etcd/pull/19846).
+
 ### etcd server
 
 - Fix [the compaction pause duration metric is not emitted for every compaction batch](https://github.com/etcd-io/etcd/pull/19771)

CHANGELOG/CHANGELOG-3.6.md

@@ -10,6 +10,10 @@ Previous change logs can be found at [CHANGELOG-3.5](https://github.com/etcd-io/
 
 ## v3.6.0-rc.5 (tbd)
 
+### Deprecations
+
+- [Deprecated the Metadata field in the Endpoint struct from the client/v3/naming/endpoints package ](https://github.com/etcd-io/etcd/pull/19842).
+
 ### etcd server
 
 - Fix [the compaction pause duration metric is not emitted for every compaction batch](https://github.com/etcd-io/etcd/pull/19770)