RFR: 8365671: Typo in Joiner.allUntil example

[Chen Liang]

On Wed, 20 Aug 2025 09:17:35 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> Fix two typos in one of the examples in Joiner.allUntil's API. (We may re-visit the example in a future update, for now, just the typos).

Looks trivially correct.

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Marked as reviewed by liach (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26856#pullrequestreview-3136990383