use ubuntu 22.04 in CI

[egillax]

No description provided.

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.57% 🎉

Comparison is base (31ef832) 99.01% compared to head (361e42b) 99.59%.
Report is 2 commits behind head on develop.

❗ Current head 361e42b differs from pull request most recent head 5f5db93. Consider uploading reports for the commit 5f5db93 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #85      +/-   ##
===========================================
+ Coverage    99.01%   99.59%   +0.57%     
===========================================
  Files            9        9              
  Lines          408      488      +80     
===========================================
+ Hits           404      486      +82     
+ Misses           4        2       -2     

Files Changed	Coverage Δ
R/Estimator.R	100.00% <100.00%> (ø)
R/HelperFunctions.R	100.00% <100.00%> (ø)
R/MLP.R	100.00% <100.00%> (ø)
R/ResNet.R	100.00% <100.00%> (ø)
R/Transformer.R	100.00% <100.00%> (+3.57%)	⬆️

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