test: Lower tolerance for iminuit v2.26.0+ on Apple silicon

[matthewfeickert]

Description

Lower the tolerance for the tests/test_optim.py test_optim_uncerts test to reach agreement for iminuit v2.26.0+ on Apple silicon.

Checklist Before Requesting Reviewer

• Tests are passing
• "WIP" removed from the title of the pull request
• Selected an Assignee for the PR to be responsible for the log summary

Before Merging

For the PR Assignees:

• Summarize commit messages into a comprehensive review of the PR

* Lower the tolerance for the tests/test_optim.py test_optim_uncerts test
  to reach agreement for iminuit v2.26.0+ on Apple silicon.

[matthewfeickert]

I'm going to approve and merge this myself. As always, PRs approved by a single core dev can be reverted as needed by the rest of the dev team.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.21%. Comparing base (faa4ccf) to head (5ba4410).
Report is 15 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2514      +/-   ##
==========================================
+ Coverage   98.08%   98.21%   +0.13%     
==========================================
  Files          69       69              
  Lines        4543     4543              
  Branches      696      804     +108     
==========================================
+ Hits         4456     4462       +6     
+ Misses         51       48       -3     
+ Partials       36       33       -3     

Flag	Coverage Δ
contrib	97.79% <ø> (ø)
doctest	98.08% <ø> (ø)
unittests-3.10	96.23% <ø> (?)
unittests-3.11	96.23% <ø> (?)
unittests-3.12	96.23% <ø> (ø)
unittests-3.8	96.25% <ø> (?)
unittests-3.9	96.27% <ø> (?)

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[matthewfeickert]

@meeseeksdev backport to release/v0.7.x