Update JSON Schema badges

[justin-tay]

Updates the JSON Schema badges from bowtie as the URL has moved.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.18%. Comparing base (48ca3c2) to head (3bd2407).
Report is 13 commits behind head on master.

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1041      +/-   ##
============================================
+ Coverage     78.90%   79.18%   +0.28%     
- Complexity     1965     1987      +22     
============================================
  Files           172      174       +2     
  Lines          6352     6438      +86     
  Branches       1255     1262       +7     
============================================
+ Hits           5012     5098      +86     
+ Misses          867      864       -3     
- Partials        473      476       +3     

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