Bump io.undertow:undertow-core in the gradle group across 1 directory (#32)

Bumps the gradle group with 1 update in the / directory: [io.undertow:undertow-core](https://github.com/undertow-io/undertow).


Updates `io.undertow:undertow-core` from 2.3.19.Final to 2.3.20.Final
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](undertow-io/undertow@2.3.19.Final...2.3.20.Final)

---
updated-dependencies:
- dependency-name: io.undertow:undertow-core
  dependency-version: 2.3.20.Final
  dependency-type: direct:production
  dependency-group: gradle
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

build.gradle

@@ -23,7 +23,7 @@ allprojects {
         protobufVersion = "3.25.5"
         slf4jVersion = "2.0.17"
         springVersion = "6.2.11"
-        undertowVersion = "2.3.19.Final"
+        undertowVersion = "2.3.20.Final"
 
         // testing
         approvaltestsVersion = "24.22.0"