RFR: 2495: Touch Command should return early on closed pull requests

[Zhao Song]

On Wed, 7 May 2025 17:22:50 GMT, Zhao Song <zsong at openjdk.org> wrote:

> In [SKARA-2480](https://bugs.openjdk.org/browse/SKARA-2480), I added a new pull request command /touch. When the /touch command is issued on a closed pull request, Skara should return immediately. I forgot to add the return statement in that logic.

Thank you for the quick review!

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PR Comment: https://git.openjdk.org/skara/pull/1718#issuecomment-2859567131