offlineimap: add patch to fix compatibility with Python 3.11

[ZhongRuoyu]

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Fixes https://github.com/orgs/Homebrew/discussions/5565.
Fixes OfflineIMAP/offlineimap3#144.
Fixes OfflineIMAP/offlineimap3#151.

[ZhongRuoyu]

Decided to revbump as this issue seems to have affected a nontrivial number of people (see linked issues).

[github-actions]

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