Bump version.io.undertow from 2.2.19.Final to 2.2.20.Final

Bumps `version.io.undertow` from 2.2.19.Final to 2.2.20.Final.

Updates `undertow-servlet-jakarta` from 2.2.19.Final to 2.2.20.Final

Updates `undertow-core` from 2.2.19.Final to 2.2.20.Final
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](undertow-io/undertow@2.2.19.Final...2.2.20.Final)

---
updated-dependencies:
- dependency-name: io.undertow:undertow-servlet-jakarta
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.undertow:undertow-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

resteasy-dependencies-bom/pom.xml

@@ -52,7 +52,7 @@
         <version.hamcrest>1.3</version.hamcrest>
         <version.io.netty.netty4>4.1.82.Final</version.io.netty.netty4>
         <version.io.vertx>4.3.4</version.io.vertx>
-        <version.io.undertow>2.2.19.Final</version.io.undertow>
+        <version.io.undertow>2.2.20.Final</version.io.undertow>
         <version.jakarta.activation>2.1.0</version.jakarta.activation>
         <version.jakarta.enterprise.cdi-api>4.0.1</version.jakarta.enterprise.cdi-api>
         <version.jakarta.inject.jakarta.inject-api>2.0.1</version.jakarta.inject.jakarta.inject-api>