Fix docs build

[IanButterworth]

@johnnychen94 there seems to be an issue with DemoCards.jl creating an index.md that cannot be found

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.19%. Comparing base (66cf9d9) to head (5508899).
Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #274      +/-   ##
==========================================
- Coverage   94.25%   94.19%   -0.06%     
==========================================
  Files          13       13              
  Lines        1706     1706              
==========================================
- Hits         1608     1607       -1     
- Misses         98       99       +1     

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[IanButterworth]

Bump

[ViralBShah]

Fixed in #284 by disabling the edit URLs generated by DemoCards which do not use the src directory. cc @mortenpi who may know how to fix this in DemoCards.jl upstream.

[ViralBShah]

I wish I had seen this PR earlier - since it would have saved me some other hunting effort...