Update fl project link

[ThijsvdLaar]

Fixes #216

[codecov-commenter]

Codecov Report

Patch coverage has no change and project coverage change: -0.07 :warning:

Comparison is base (7add269) 87.29% compared to head (7c15f80) 87.23%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #217      +/-   ##
==========================================
- Coverage   87.29%   87.23%   -0.07%     
==========================================
  Files          97       97              
  Lines        4645     4645              
==========================================
- Hits         4055     4052       -3     
- Misses        590      593       +3     

see 3 files with indirect coverage changes

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