Bump io.undertow:undertow-core from 2.3.19.Final to 2.3.20.Final#56

ligangty merged 1 commit intomasterCommonjava/http-testserver:masterfrom

dependabot/maven/io.undertow-undertow-core-2.3.20.FinalCommonjava/http-testserver:dependabot/maven/io.undertow-undertow-core-2.3.20.FinalCopy head branch name to clipboard