change dyno of review apps

[artoonie]

"free" is deprecated -- use "eco" ($5/mo)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.69%. Comparing base (67c378a) to head (1208196).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #519      +/-   ##
==========================================
- Coverage   96.70%   96.69%   -0.02%     
==========================================
  Files         121      121              
  Lines        5833     5833              
==========================================
- Hits         5641     5640       -1     
- Misses        192      193       +1     

see 1 file with indirect coverage changes

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