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

python3-sympy: update to 1.11.1, adopt.
https://github.com/void-linux/void-packages/pull/39872

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

Tested with sagemath-9.5, and with WIP sagemath-9.7. Can be safely updated independently of sagemath.

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