Fix java_home alternative

[lutkerd]

Fix for corretto/corretto-docker#129

Built and tested locally with the headless package and the path is created as expected.

bash-4.2# ls -l /usr/lib/jvm
total 4
lrwxrwxrwx 1 root root   41 Dec 28 19:51 java-17-amazon-corretto -> /etc/alternatives/java-17-amazon-corretto
drwxr-xr-x 7 root root 4096 Dec 28 19:51 java-17-amazon-corretto.x86_64
lrwxrwxrwx 1 root root   21 Dec 28 19:51 jre -> /etc/alternatives/jre
lrwxrwxrwx 1 root root   24 Dec 28 19:51 jre-17 -> /etc/alternatives/jre_17
lrwxrwxrwx 1 root root   32 Dec 28 19:51 jre-17-openjdk -> /etc/alternatives/jre_17_openjdk
lrwxrwxrwx 1 root root   29 Dec 28 19:51 jre-openjdk -> /etc/alternatives/jre_openjdk
bash-4.2# realpath /usr/lib/jvm/java-17-amazon-corretto
/usr/lib/jvm/java-17-amazon-corretto.x86_64