docker: fix typos

[mloubout]

Fix typos in action for docker.

[codecov]

Codecov Report

Merging #1397 into master will decrease coverage by 0.92%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1397      +/-   ##
==========================================
- Coverage   86.99%   86.06%   -0.93%     
==========================================
  Files         188      188              
  Lines       26926    26926              
  Branches     3662     3662              
==========================================
- Hits        23424    23175     -249     
- Misses       3075     3324     +249     
  Partials      427      427              

Impacted Files	Coverage Δ
examples/seismic/viscoacoustic/operators.py	0.00% <0.00%> (-100.00%)	⬇️
examples/seismic/viscoacoustic/wavesolver.py	0.00% <0.00%> (-100.00%)	⬇️
...les/seismic/viscoacoustic/viscoacoustic_example.py	0.00% <0.00%> (-72.23%)	⬇️
examples/seismic/tti/operators.py	62.50% <0.00%> (-33.34%)	⬇️
examples/seismic/tti/tti_example.py	35.13% <0.00%> (-21.63%)	⬇️
examples/seismic/acoustic/acoustic_example.py	30.90% <0.00%> (-20.00%)	⬇️
examples/seismic/tti/wavesolver.py	79.36% <0.00%> (-17.47%)	⬇️
examples/seismic/acoustic/operators.py	79.74% <0.00%> (-16.46%)	⬇️
examples/seismic/preset_models.py	50.58% <0.00%> (-8.14%)	⬇️
examples/seismic/model.py	82.97% <0.00%> (-6.39%)	⬇️
... and 1 more

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