Update aws layer supported runtimes

[kruskall]

aws layer set java 8 and java 11 as supported runtimes but those are EOL:

apm-agent-java/.ci/publish-aws.sh

Line 37 in 240ae06

--compatible-runtimes java8.al2 java11 \

we should updated the supported runtimes to include modern java versions

[JonasKunz]

Thanks for pointing this out!