There's a merged pull request on the void-packages repository

python3-openpyxl: update to 3.1.3.
https://github.com/void-linux/void-packages/pull/51510

Description:
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#### Testing the changes
- I tested the changes in this PR: **YES**

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#### Local build testing
- I built this PR locally for my native architecture, x86_64-glibc

Notes:
- Mostly bugfixes according to [changelog](https://openpyxl.readthedocs.io/en/stable/changes.html#id1). Checks passed locally.
- Adjusted template a bit.
- BTW, it's also an optional dep for visidata to read from XLSX files (see [setup.py](https://github.com/saulpw/visidata/blob/v3.0.2/setup.py)), but as visidata template seems to miss a lot of extra deps, I'm not adding it explicitly.