Another attempt to fix using JDK 22

.gitlab-ci.yml

 variables:
   GRADLE_OPTS: "-Dorg.gradle.daemon=false"
+  JAVA_HOME: "/home/jonathan/.jdks/openjdk-22.0.1"
 
 cache:
   paths:
@@ -11,10 +12,10 @@ stages:
 
 build_mod:
   stage: build
+before_script:
+  - export PATH=$JAVA_HOME/bin:$PATH
+  - java -version
   script:
-    - export JAVA_HOME=/home/jonathan/.jdks
-    - export PATH=$JAVA_HOME/bin:$PATH
-    - java -version
     - |
       declare -a versions=("1.20.3" "1.20.4" "1.20.5" "1.20.6")
       declare -a mappings=("1.20.3+build.1" "1.20.4+build.3" "1.20.5+build.1" "1.20.6+build.1")