community/openjdk11: upgrade to 11.0.20
This MR updates OpenJDK 11 to the latest release: https://www.oracle.com/java/technologies/javase/11-0-20-relnotes.html
This MR updates OpenJDK 11 to the latest release: https://www.oracle.com/java/technologies/javase/11-0-20-relnotes.html