update CI python version

[codecov-commenter]

Codecov Report

Merging #82 (47ea97c) into develop (16a95f5) will increase coverage by 0.48%. The diff coverage is n/a.

:exclamation: Current head 47ea97c differs from pull request most recent head 5000eeb. Consider uploading reports for the commit 5000eeb to get more accurate results

@@             Coverage Diff             @@
##           develop      #82      +/-   ##
===========================================
+ Coverage    78.25%   78.73%   +0.48%     
===========================================
  Files           32       32              
  Lines         2359     2417      +58     
===========================================
+ Hits          1846     1903      +57     
- Misses         513      514       +1     

Impacted Files	Coverage Δ
aiida_lsmo/calcfunctions/oxidation_state.py	100.00% <0.00%> (ø)
aiida_lsmo/calcfunctions/ff_builder_module.py	87.80% <0.00%> (+0.07%)	:arrow_up:
aiida_lsmo/workchains/cp2k_multistage.py	90.21% <0.00%> (+0.10%)	:arrow_up:
aiida_lsmo/workchains/cp2k_multistage_ddec.py	95.23% <0.00%> (+0.11%)	:arrow_up:
aiida_lsmo/workchains/sim_annealing.py	96.09% <0.00%> (+0.12%)	:arrow_up:
aiida_lsmo/utils/multiply_unitcell.py	95.65% <0.00%> (+0.12%)	:arrow_up:
aiida_lsmo/workchains/isotherm_inflection.py	90.90% <0.00%> (+0.21%)	:arrow_up:
aiida_lsmo/workchains/multicomp_ads_des.py	93.65% <0.00%> (+0.24%)	:arrow_up:
aiida_lsmo/workchains/isotherm.py	89.86% <0.00%> (+0.33%)	:arrow_up:
aiida_lsmo/workchains/cp2k_binding_energy.py	84.37% <0.00%> (+0.37%)	:arrow_up:
... and 11 more

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