DM-39276: Address docstring typo in pipe_base config.py

[leeskelvin]

Checklist

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

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.06 ⚠️

Comparison is base (c6e9eb1) 82.59% compared to head (64f2c21) 82.53%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #337      +/-   ##
==========================================
- Coverage   82.59%   82.53%   -0.06%     
==========================================
  Files          62       62              
  Lines        6970     6970              
  Branches     1385     1274     -111     
==========================================
- Hits         5757     5753       -4     
- Misses        933      935       +2     
- Partials      280      282       +2     

Impacted Files	Coverage Δ
python/lsst/pipe/base/config.py	67.46% <ø> (ø)

... and 2 files with indirect coverage changes

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