Replacing the wrong link with the correct.

[sosiska]

Which problem is this PR solving?

Same as jaegertracing/jaeger#1413

Short description of the changes

This change replaces the incorrect link in the .MD file with the correct one.

[codecov]

Codecov Report

Merging #604 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #604   +/-   ##
=========================================
  Coverage     89.53%   89.53%           
  Complexity      542      542           
=========================================
  Files            68       68           
  Lines          1949     1949           
  Branches        251      251           
=========================================
  Hits           1745     1745           
  Misses          129      129           
  Partials         75       75

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