Fix link to the license file

[maciaszczykm]

No description provided.

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[codecov-io]

Codecov Report

Merging #224 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #224   +/-   ##
=======================================
  Coverage   98.52%   98.52%           
=======================================
  Files          12       12           
  Lines         814      814           
  Branches       65       65           
=======================================
  Hits          802      802           
  Misses         12       12

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[maciaszczykm]

I signed it!

[googlebot]

CLAs look good, thanks!

[ofrobots]

Thanks for the fix @maciaszczykm !