Bump Netty to 4.2.9.Final (#2135)

Closes #2134

Author: jorenkoyen

pom.xml

@@ -45,7 +45,7 @@
         <maven.compiler.target>11</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
-        <netty.version>4.2.8.Final</netty.version>
+        <netty.version>4.2.9.Final</netty.version>
         <brotli4j.version>1.18.0</brotli4j.version>
         <slf4j.version>2.0.16</slf4j.version>
         <zstd-jni.version>1.5.7-2</zstd-jni.version>