Fix typo in "celcius"

[julienduquesne]

The right spelling is "celsius"

• If this PR is a bug fix, the bug is documented in the test suite.
• Changes were documented in the changelog (pending section).
• If necessary, changes were made to the documentation (eg new pipeline).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bd0c388) 96.70% compared to head (93411f8) 96.70%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #247   +/-   ##
=======================================
  Coverage   96.70%   96.70%           
=======================================
  Files         255      255           
  Lines        8372     8372           
=======================================
  Hits         8096     8096           
  Misses        276      276           

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[percevalw]

Nice catch, thanks !