Bump nettyVersion from 4.1.54.Final to 4.1.55.Final

Bumps `nettyVersion` from 4.1.54.Final to 4.1.55.Final.

Updates `netty-codec` from 4.1.54.Final to 4.1.55.Final
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](netty/netty@netty-4.1.54.Final...netty-4.1.55.Final)

Updates `netty-all` from 4.1.54.Final to 4.1.55.Final
- [Release notes](https://github.com/netty/netty/releases)
- [Commits](netty/netty@netty-4.1.54.Final...netty-4.1.55.Final)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

build.gradle

@@ -39,7 +39,7 @@ subprojects {
         javassistVersion = '3.27.0-GA'
         jettyVersion = '9.4.35.v20201120'
         log4jVersion = '2.14.0'
-        nettyVersion = '4.1.54.Final'
+        nettyVersion = '4.1.55.Final'
         littleProxyVersion = '2.0.1'
         slf4jVersion = '1.7.30'
         guavaVersion = '30.0-jre'