docs(CHANGELOG) include changes for 2.8.1

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Table of Contents
 
+- [2.8.1](#281)
 - [2.8.0](#280)
 - [2.7.1](#271)
 - [2.7.0](#270)
@@ -171,8 +172,8 @@
   - `oauth2` changed from 1004 to 1400
   - `rate-limiting` changed from 901 to 910
 - **JWT**: The authenticated JWT is no longer put into the nginx
-  context (ngx.ctx.authenticated_jwt_token).  Custom plugins which depend on that 
-  value being set under that name must be updated to use Kong's shared context 
+  context (ngx.ctx.authenticated_jwt_token).  Custom plugins which depend on that
+  value being set under that name must be updated to use Kong's shared context
   instead (kong.ctx.shared.authenticated_jwt_token) before upgrading to 3.0
 
 ### Deprecations
@@ -345,6 +346,37 @@ a restart (e.g., upon a plugin server crash).
   instead of `proxy_error_log` [8583](https://github.com/Kong/kong/pull/8583)
 
 
+### Additions
+
+#### Performance
+- Do not register unnecessary event handlers on Hybrid mode Control Plane
+nodes [#8452](https://github.com/Kong/kong/pull/8452).
+
+
+## [2.8.1]
+
+### Dependencies
+
+- Bumped lua-resty-healthcheck from 1.5.0 to 1.5.1
+  [#8584](https://github.com/Kong/kong/pull/8584)
+- Bumped `OpenSSL` from 1.1.1l to 1.1.1n
+  [#8635](https://github.com/Kong/kong/pull/8635)
+
+### Fixes
+
+#### Core
+
+- Only reschedule router and plugin iterator timers after finishing previous
+  execution, avoiding unnecessary concurrent executions.
+  [#8634](https://github.com/Kong/kong/pull/8634)
+- Implements conditional rebuilding of router, plugins iterator and balancer on
+  data planes. This means that DPs will not rebuild router if there were no
+  changes in routes or services. Similarly, the plugins iterator will not be
+  rebuilt if there were no changes to plugins, and, finally, the balancer will not be
+  reinitialized if there are no changes to upstreams or targets.
+  [#8639](https://github.com/Kong/kong/pull/8639)
+
+
 ## [2.8.0]
 
 ### Deprecations
@@ -7147,6 +7179,7 @@ First version running with Cassandra.
 
 [Back to TOC](#table-of-contents)
 
+[2.8.1]: https://github.com/Kong/kong/compare/2.8.0...2.8.1
 [2.8.0]: https://github.com/Kong/kong/compare/2.7.0...2.8.0
 [2.7.1]: https://github.com/Kong/kong/compare/2.7.0...2.7.1
 [2.7.0]: https://github.com/Kong/kong/compare/2.6.0...2.7.0