Fix Ubuntu/Java version in .bazelrc comment
Looks like this was just a copy/paste from the `ubuntu1804_java11` config above
Closes
@@ -23,7 +23,7 @@ build:ubuntu1804_java11 --host_platform=//:rbe_ubuntu1804_java11_platform
build:ubuntu1804_java11 --platforms=//:rbe_ubuntu1804_java11_platform
build:ubuntu1804_java11 --config=remote_shared
-# Configuration to build and test Bazel on RBE on Ubuntu 18.04 with Java 11
+# Configuration to build and test Bazel on RBE on Ubuntu 16.04 with Java 8
build:ubuntu1604_java8 --host_javabase=@rbe_ubuntu1604_java8//java:jdk
build:ubuntu1604_java8 --javabase=@rbe_ubuntu1604_java8//java:jdk
build:ubuntu1604_java8 --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_hostjdk8
