[misc] adding java 21 to test suite

.travis.yml

@@ -19,17 +19,21 @@ import: mariadb-corporation/connector-test-machine:common-build.yml@master
 jobs:
  include:
  - stage: Language
- env: srv=mariadb v=10.6 packet=40 PROFILE=java8
+ env: srv=mariadb v=11.4 packet=40 PROFILE=java8
  jdk: openjdk8
- name: "CS 10.6 - openjdk 8"
+ name: "CS 11.4 - openjdk 8"
  - stage: Language
- env: srv=mariadb v=10.6 packet=8
+ env: srv=mariadb v=11.4 packet=8
  jdk: openjdk11
- name: "CS 10.6 - openjdk 11 - packet 8M"
+ name: "CS 11.4 - openjdk 11 - packet 8M"
  - stage: Language
- env: srv=mariadb v=10.6 packet=40
+ env: srv=mariadb v=11.4 packet=40
  jdk: openjdk17
- name: "CS 10.6 - openjdk 17 - packet 40M"
+ name: "CS 11.4 - openjdk 17 - packet 40M"
+ - stage: Language
+ env: srv=mariadb v=11.4
+ jdk: openjdk21
+ name: "CS 11.4 - openjdk 21"
  - stage: Benchmarks
  env: srv=mariadb v=10.6 local=1 BENCH=1
  name: "Benchmarks"