fix gridcode pydoc

[philvarner]

Related Issue(s):

• n/a

Description:

fix grid extension docs on code property, which were not modified after copying from the MGRS extension (oops, my fault!)

PR Checklist:

• pre-commit hooks pass locally
• Tests pass (run scripts/test)
• Documentation has been updated to reflect changes, if applicable
• This PR maintains or improves overall codebase code coverage.
• Changes are added to the CHANGELOG. See the docs for information about adding to the changelog.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.20%. Comparing base (3b4ca59) to head (3dfea2e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1332   +/-   ##
=======================================
  Coverage   91.20%   91.20%           
=======================================
  Files          51       51           
  Lines        7024     7024           
  Branches     1005     1005           
=======================================
  Hits         6406     6406           
  Misses        443      443           
  Partials      175      175           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.