docs: fix the url for the edgex docs

[presatish]

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• [X] I am not introducing a breaking change (if you are, flag in conventional commit message with BREAKING CHANGE: describing the break)
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Codecov Report

Merging #340 (467121e) into levski (657b8d4) will not change coverage. The diff coverage is n/a.

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@@           Coverage Diff           @@
##           levski     #340   +/-   ##
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  Coverage   31.77%   31.77%           
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  Files          18       18           
  Lines        1822     1822           
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  Hits          579      579           
  Misses       1179     1179           
  Partials       64       64