RFR: 8285440: Typo in Collections.addAll method javadoc

[Jaikiran Pai]

On Fri, 31 Dec 2021 18:58:43 GMT, Johnny Lim <duke at openjdk.java.net> wrote:

> This PR fixes a typo.

Thank you for contributing. The change looks fine to me. After someone with a Reviewer role approves this change, I can sponsor this for you.

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Marked as reviewed by jpai (Committer).

PR: https://git.openjdk.java.net/jdk/pull/6942