test: fix github environment variable setup

[air1one]

Summary

Environment variables were not correctly set up for github test workflow.

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #3578 into 2.6 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              2.6    #3578   +/-   ##
=======================================
  Coverage   66.12%   66.12%           
=======================================
  Files         440      440           
  Lines       12481    12481           
  Branches     1714     1714           
=======================================
  Hits         8253     8253           
  Misses       4194     4194           
  Partials       34       34

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