RFR: 2338: Fix trivial typo in numeral

[Zhao Song]

On Tue, 23 Jul 2024 11:06:07 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> The bug is insignificant and only affects generated emails; for example:
> 
>  * https://mail.openjdk.org/pipermail/core-libs-dev/2021-October/082663.html
>  * https://mail.openjdk.org/pipermail/core-libs-dev/2024-February/118754.html

Marked as reviewed by zsong (Reviewer).

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PR Review: https://git.openjdk.org/skara/pull/1681#pullrequestreview-2194495950