Upgrade to Netty 4.1.89.Final.

Closes #752

Author: mp911de

pom.xml

@@ -38,7 +38,7 @@
 		<kotlin-coroutines.version>1.6.4</kotlin-coroutines.version>
 		<mockk.version>1.13.4</mockk.version>
 		<mockito-core.version>4.9.0</mockito-core.version>
-		<netty.version>4.1.87.Final</netty.version>
+		<netty.version>4.1.89.Final</netty.version>
 		<okhttp3.version>3.14.9</okhttp3.version>
 		<spring.version>6.0.5</spring.version>
 		<spring-asciidoctor-backends.version>0.0.4</spring-asciidoctor-backends.version>