bump min python version for intersphinx map

[natestemen]

missed this in https://github.com/unitaryfund/mitiq/pull/2066. does what it says on the 🥫.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.32%. Comparing base (c0e68a4) to head (1e16a16). Report is 42 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2425 +/- ## ======================================= Coverage 98.32% 98.32% ======================================= Files 87 87 Lines 4048 4048 ======================================= Hits 3980 3980 Misses 68 68 ```

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