DM-35692: unpin pip

[mwittgen]

Checklist

• ran Jenkins
• added a release note for user-visible changes to doc/changes

[codecov]

Codecov Report

Base: 81.41% // Head: 81.38% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (fe9f033) compared to base (0f24d1f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #293      +/-   ##
==========================================
- Coverage   81.41%   81.38%   -0.04%     
==========================================
  Files          57       57              
  Lines        6193     6193              
  Branches     1142     1142              
==========================================
- Hits         5042     5040       -2     
- Misses        919      920       +1     
- Partials      232      233       +1     

Impacted Files	Coverage Δ
python/lsst/pipe/base/graph/graph.py	81.57% <0.00%> (-0.55%)	⬇️

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