RFR: 8268077: java.util.List missing from Collections Framework Overview

Trivial changes to this non-normative document. ------------- Commit messages: - 8268077: java.util.List missing from Collections Framework Overview Changes: https://git.openjdk.java.net/jdk/pull/4289/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=4289&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8268077 Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod Patch: https://git.openjdk.java.net/jdk/pull/4289.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/4289/head:pull/4289 PR: https://git.openjdk.java.net/jdk/pull/4289