Fix DEMO endpoint from returning incorrect data

[btmonier]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 98.61%. Comparing base (698bd6e) to head (04f9e42).

Files	Patch %	Lines
R/read_ref_ranges.R	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master       #4   +/-   ##
=======================================
  Coverage   98.61%   98.61%           
=======================================
  Files          25       25           
  Lines         797      797           
=======================================
  Hits          786      786           
  Misses         11       11           

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