Bump version to 0.34.0

[A5rocks]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00000%. Comparing base (a443d4e) to head (d3ff045).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@               Coverage Diff               @@
##                 main        #3491   +/-   ##
===============================================
  Coverage   100.00000%   100.00000%           
===============================================
  Files             128          128           
  Lines           19461        19452    -9     
  Branches         1321         1321           
===============================================
- Hits            19461        19452    -9     

Files with missing lines	Coverage Δ
src/trio/_core/_tests/test_asyncgen.py	100.00000% <ø> (ø)
src/trio/_sync.py	100.00000% <100.00000%> (ø)
src/trio/_tests/test_sync.py	100.00000% <100.00000%> (ø)
src/trio/_version.py	100.00000% <100.00000%> (ø)

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