Fix: Rename environment variable

[localheinz]

This PR

• renames an environment variable

[codecov]

Codecov Report

Merging #471 into main will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #471   +/-   ##
=========================================
  Coverage     80.92%   80.92%           
  Complexity       41       41           
=========================================
  Files             4        4           
  Lines           194      194           
=========================================
  Hits            157      157           
  Misses           37       37           

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