Bump undertow-servlet-jakartaee9 from 2.2.8.Final to 2.2.12.Final

Bumps [undertow-servlet-jakartaee9](https://github.com/undertow-io/undertow) from 2.2.8.Final to 2.2.12.Final.
- [Release notes](https://github.com/undertow-io/undertow/releases)
- [Commits](undertow-io/undertow@2.2.8.Final...2.2.12.Final)

---
updated-dependencies:
- dependency-name: io.undertow:undertow-servlet-jakartaee9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

environments/servlet/pom.xml

@@ -34,7 +34,7 @@
         <jetty9.asm.version>7.0</jetty9.asm.version>
         <websockets.api>2.0.0</websockets.api>
         <!-- We need undertow which uses Jakarta 9 packages! -->
-        <undertow.version>2.2.8.Final</undertow.version>
+        <undertow.version>2.2.12.Final</undertow.version>
         <!-- Testing deps -->
         <apache.httpclient.version>3.1</apache.httpclient.version>
     </properties>