Fix links in Libraries doc

[pakoito]

My bad

[codecov]

Codecov Report

Merging #995 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #995      +/-   ##
============================================
+ Coverage     46.94%   46.95%   +0.01%     
  Complexity      688      688              
============================================
  Files           318      318              
  Lines          8073     8073              
  Branches        848      848              
============================================
+ Hits           3790     3791       +1     
  Misses         3940     3940              
+ Partials        343      342       -1

Impacted Files	Coverage Δ	Complexity Δ
...ics/src/main/kotlin/arrow/optics/instances/mapk.kt	90.9% <0%> (+4.54%)	0% <0%> (ø)	⬇️

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