Bump netty-codec-http from 4.1.71.Final to 4.1.77.Final in /testbom

That makes it to be in sync with the one used on wildfly-full

Dev tag: https://github.com/netty/netty/releases/tag/netty-4.1.77.Final
Diff since previous integrated release: https://github.com/netty/netty/compare/netty-4.1.71.Final...netty-4.1.77.Final