Small doc fixes and update testing dependencies

[clonker]

No description provided.

[codecov]

Codecov Report

Merging #223 (f670565) into main (590f67e) will increase coverage by 0.00%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #223   +/-   ##
=======================================
  Coverage   93.74%   93.75%           
=======================================
  Files         136      136           
  Lines       10807    10816    +9     
=======================================
+ Hits        10131    10140    +9     
  Misses        676      676           

Impacted Files	Coverage Δ
deeptime/markov/msm/tram/_tram.py	96.34% <ø> (ø)
deeptime/decomposition/deep/_vampnet.py	94.73% <0.00%> (+0.04%)	⬆️
deeptime/util/torch.py	93.49% <0.00%> (+0.39%)	⬆️

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