NEWS: generate for 4.20.1

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NEWS.md

@@ -1,6 +1,8 @@
-4.20.0
+4.20.1
 ======
 
+_This is a hotfix release that fixes a rare metric race condition causing a reload time crash._
+
 AxoSyslog is binary-compatible with syslog-ng [1] and serves as a drop-in replacement.
 
 We provide [cloud-ready container images](https://github.com/axoflow/axosyslog/#container-images) and Helm charts.
@@ -109,6 +111,9 @@ Check out the [AxoSyslog documentation](https://axoflow.com/docs/axosyslog-core/
 
 ## Bugfixes
 
+  * `metrics`: Fixed a rare race condition in dynamic metrics.
+    ([#858](https://github.com/axoflow/axosyslog/pull/858))
+
   * `filterx`: Fixed various memory leaks
     ([#829](https://github.com/axoflow/axosyslog/pull/829))
     ([#836](https://github.com/axoflow/axosyslog/pull/836))