[jdk21] RFR: 8311034: Fix typo in javac man page

[Roger Riggs]

On Wed, 28 Jun 2023 14:00:02 GMT, Pavel Rappo <prappo at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [f17bfeec](https://github.com/openjdk/jdk/commit/f17bfeec61b753eb0eb8a48df9bf5ccc3bcd9eb3) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Pavel Rappo on 28 Jun 2023 and was reviewed by Hannes Wallnöfer.
> 
> Thanks!

Marked as reviewed by rriggs (Reviewer).

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PR Review: https://git.openjdk.org/jdk21/pull/76#pullrequestreview-1503214387