Update error-codes.mdx

[bthaile]

remove --> since it looks to be causing an error in converting to html

Description

error in converting markdown causing page to crash in dev portal

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For contributor use:

• Targeted PR against master branch
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the standards mentioned here.
• Updated relevant documentation
• Re-reviewed Files changed in the Github PR explorer
• Added appropriate labels

[codecov-commenter]

Codecov Report

Merging #349 (bfb443a) into master (54ba363) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #349   +/-   ##
=======================================
  Coverage   62.99%   62.99%           
=======================================
  Files          23       23           
  Lines        2113     2113           
=======================================
  Hits         1331     1331           
  Misses        657      657           
  Partials      125      125           

Flag	Coverage Δ
unittests	62.99% <ø> (ø)

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[justinbarry]

LGTM