upgrade jdk8

(cherry picked from commit d5ecfb8)

Author: tomasstupka

ci_common/common.hocon

@@ -1,7 +1,7 @@
 # java 7 is needed by Truffle (for now)
 java7 : {name : oraclejdk, version : "7",    platformspecific: true}
 # java 8 must be a jvmci enabled variant
-java8 : {name : oraclejdk, version : "8u221-jvmci-19.3-b02", platformspecific: true}
+java8 : {name : oraclejdk, version : "8u231-jvmci-19.3-b04", platformspecific: true}
 java11 : {name : labsjdk, version : "ce-11.0.5+9-jvmci-19.3-b03", platformspecific: true}
 
 java8Downloads : {