Add upcoming trainings

[The-Compiler]

Two upcoming trainings in Switzerland I plan to do 😉

[codecov]

Codecov Report

Merging #5544 into master will decrease coverage by 31.25%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #5544       +/-   ##
===========================================
- Coverage   96.11%   64.85%   -31.26%     
===========================================
  Files         117      117               
  Lines       25695    25695               
  Branches     2493     2493               
===========================================
- Hits        24696    16665     -8031     
- Misses        695     8510     +7815     
- Partials      304      520      +216

Impacted Files	Coverage Δ
testing/test_reports.py	10.49% <0%> (-89.51%)	⬇️
testing/test_pdb.py	13.51% <0%> (-85.49%)	⬇️
testing/test_collection.py	15.04% <0%> (-84.77%)	⬇️
testing/test_session.py	16.12% <0%> (-83.88%)	⬇️
testing/test_stepwise.py	16.66% <0%> (-83.34%)	⬇️
testing/python/show_fixtures_per_test.py	17.64% <0%> (-82.36%)	⬇️
testing/python/setup_plan.py	20% <0%> (-80%)	⬇️
testing/logging/test_reporting.py	20.19% <0%> (-79.48%)	⬇️
testing/python/setup_only.py	21.42% <0%> (-78.58%)	⬇️
testing/test_junitxml.py	20.31% <0%> (-77.8%)	⬇️
... and 78 more

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