Use Java 21.

Update the version of Java in the ODK images to 21 (needed for the
latest versions of Jena).

closes #1348

Author: gouttegd

Dockerfile

@@ -25,7 +25,7 @@ ENV COURSIER_CACHE="/odk/tools/.coursier-cache"
 RUN apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y --no-install-recommends  \
     build-essential \
     openssh-client \
-    openjdk-11-jdk-headless \
+    openjdk-21-jdk-headless \
     maven \
     python3-dev \
     subversion \

docker/odklite/Dockerfile

@@ -24,7 +24,7 @@ ENV ROBOT_JAR=$ROBOT_JAR
 RUN apt-get update && \
     DEBIAN_FRONTEND="noninteractive" apt-get install -y --no-install-recommends \
         git \
-        openjdk-11-jre-headless \
+        openjdk-21-jre-headless \
         python3-pip \
         python-is-python3 \
         python3-six \