Improve the clarity of comments in the ObjectInputFilter FilterInThread example.
------------- Commit messages: - 8271489: (doc) Clarify Filter Factory example Changes: https://git.openjdk.java.net/jdk17/pull/293/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=293&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271489 Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod Patch: https://git.openjdk.java.net/jdk17/pull/293.diff Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/293/head:pull/293 PR: https://git.openjdk.java.net/jdk17/pull/293
