Fix wrong env var for GS path in Snap

[helkaluin]

Fixes #1167

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.00%. Comparing base (2005f62) to head (6935588).
Report is 41 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1300      +/-   ##
==========================================
- Coverage   90.25%   90.00%   -0.25%     
==========================================
  Files          94       94              
  Lines        6864     6926      +62     
  Branches     1233     1250      +17     
==========================================
+ Hits         6195     6234      +39     
- Misses        468      484      +16     
- Partials      201      208       +7     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.