Upgrade to GraalVM 22.2

Closes gh-80

.sdkmanrc

@@ -1,3 +1,3 @@
 # Enable auto-env through the sdkman_auto_env config
 # Add key=value pairs of SDKs to use below
-java=22.1.r17-nik
+java=22.2.r17-nik

ci/images/README.adoc

@@ -20,9 +20,9 @@ To test run:
 $ docker run -it --entrypoint /bin/bash <SHA>
 ----
 
-## How To
+== How To
 
-### Update GraalVM version
+=== Update GraalVM version
 
 1. Add a new switch case in `get-graal-url.sh`
 2. Adjust script invocation of `setup.sh` in `ci-image/Dockerfile`

ci/images/ci-image/Dockerfile

@@ -3,7 +3,7 @@ FROM ubuntu:focal-20220531
 ADD setup.sh /setup.sh
 ADD get-graal-url.sh /get-graal-url.sh
 ADD get-docker-url.sh /get-docker-url.sh
-RUN ./setup.sh graal22_1
+RUN ./setup.sh graal22_2
 
 ENV JAVA_HOME /opt/graalvm
 ENV PATH $JAVA_HOME/bin:/opt/ytt/bin:/opt/docker-compose/bin:$PATH