ignore jupyter folders

[CagtayFabry]

Changes

ignore .ipynb_checkpoints folders in pytest discovery

[marscher]

why would we have these in the root directory?

[github-actions]

Test Results

2 187 tests  ±0   2 186 ✔️ ±0   2m 30s ⏱️ - 1m 2s
       1 suites ±0          1 💤 ±0 
       1 files   ±0          0 ❌ ±0 

Results for commit 76268c5. ± Comparison against base commit e7d510f.

[codecov]

Codecov Report

Merging #849 (76268c5) into master (d1263a4) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #849      +/-   ##
==========================================
- Coverage   96.60%   96.59%   -0.02%     
==========================================
  Files          95       95              
  Lines        6222     6222              
==========================================
- Hits         6011     6010       -1     
- Misses        211      212       +1     

Impacted Files	Coverage Δ
weldx/asdf/file.py	96.27% <ø> (ø)
weldx/asdf/util.py	90.88% <0.00%> (-0.32%)	⬇️

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[CagtayFabry]

why would we have these in the root directory?

jupyter tends to create a lot of temporary files in those folders (e.g. when opening a .py file)
They don't pop up in the root dir, the exclude works in subfolders