breaking: fix geoJson parameter

[aMahanna]

Closes #234

We are currently using the parameter name ordered to specify whether a Geo Index should be created using GeoJson data-format or not, which can be confusing to users.

This PR just renames the parameter to geo_json

Ref: https://docs.arangodb.com/3.11/index-and-search/indexing/working-with-indexes/geo-spatial-indexes/

[apetenchea]

I agree with this change. Unfortunately there's no easy way around it. We'll have to state it clearly in the release notes.
It's worth doing a major release anyway, since we're adding support for multiple features.
As a user, at least the fix should be pretty obvious from the documentation.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (805425d) 98.33% compared to head (08c4da0) 98.33%.

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #318   +/-   ##
=======================================
  Coverage   98.33%   98.33%           
=======================================
  Files          26       26           
  Lines        4201     4201           
=======================================
  Hits         4131     4131           
  Misses         70       70           

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