update min python in pyproject

[kecnry]

Description

#2152 removed support for python 3.8, but the min version in pyproject.toml was not updated

Change log entry

• Is a change log needed? If yes, is it added to CHANGES.rst? If you want to avoid merge conflicts,
  list the proposed change log here for review and add to CHANGES.rst before merge. If no, maintainer
  should add a no-changelog-entry-needed label.

Checklist for package maintainer(s)

This checklist is meant to remind the package maintainer(s) who will review this pull request of some common things to look for. This list is not exhaustive.

• Are two approvals required? Branch protection rule does not check for the second approval. If a second approval is not necessary, please apply the trivial label.
• Do the proposed changes actually accomplish desired goals? Also manually run the affected example notebooks, if necessary.
• Do the proposed changes follow the STScI Style Guides?
• Are tests added/updated as required? If so, do they follow the STScI Style Guides?
• Are docs added/updated as required? If so, do they follow the STScI Style Guides?
• Did the CI pass? If not, are the failures related?
• Is a milestone set? Set this to bugfix milestone if this is a bug fix and needs to be released ASAP; otherwise, set this to the next major release milestone.
• After merge, any internal documentations need updating (e.g., JIRA, Innerspace)?

[pllim]

Huh, he did update setup.cfg so maybe that change was lost when he came back to get rid of setup.cfg . 🤷

Thanks!

[codecov]

Codecov Report

Attention: 10 lines in your changes are missing coverage. Please review.

Comparison is base (bd312bd) 91.51% compared to head (628582e) 91.53%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
...plugins/spectral_extraction/spectral_extraction.py	86.48%	5 Missing ⚠️
...daviz/configs/default/plugins/collapse/collapse.py	86.48%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2597      +/-   ##
==========================================
+ Coverage   91.51%   91.53%   +0.01%     
==========================================
  Files         161      161              
  Lines       19596    19724     +128     
==========================================
+ Hits        17934    18054     +120     
- Misses       1662     1670       +8     

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[lumberbot-app]

Something went wrong ... Please have a look at my logs.

It seems that the branch you are trying to backport to does not exist.

[kecnry]

@meeseeksdev backport to v3.8.x

(seems that since the branch didn't exist when the label was created, we're always going to have to do this for 3.8... or can we recreate the label?)

[pllim]

So weird that the label creation time matters. You can try to recreate the label and see. 🤞