Fix invalid link in detekt html report

[picklebento]

This fixes #3420

[codecov]

Codecov Report

Merging #3421 (41bc807) into master (6d7374b) will decrease coverage by 0.00%.
The diff coverage is 80.00%.

@@             Coverage Diff              @@
##             master    #3421      +/-   ##
============================================
- Coverage     80.38%   80.37%   -0.01%     
- Complexity     2748     2749       +1     
============================================
  Files           449      449              
  Lines          8300     8301       +1     
  Branches       1587     1590       +3     
============================================
  Hits           6672     6672              
  Misses          774      774              
- Partials        854      855       +1     

Impacted Files	Coverage Δ	Complexity Δ
...rturbosch/detekt/rules/bugs/UnnecessarySafeCall.kt	75.00% <66.66%> (ø)	5.00 <0.00> (+1.00)
...turbosch/detekt/rules/style/UnusedPrivateMember.kt	90.76% <100.00%> (+0.14%)	5.00 <0.00> (ø)
...ain/kotlin/io/github/detekt/metrics/LinesOfCode.kt	92.30% <0.00%> (-0.80%)	0.00% <0.00%> (ø%)
...gitlab/arturbosch/detekt/cli/runners/AstPrinter.kt	100.00% <0.00%> (ø)	4.00% <0.00%> (ø%)

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