Pass the authentication to format_pr_entry

[fcollonval]

Fixes #490

[codecov]

Codecov Report

Base: 82.10% // Head: 82.10% // Increases project coverage by +0.00% 🎉

Coverage data is based on head (dff3d4a) compared to base (dcaef66).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #489   +/-   ##
=======================================
  Coverage   82.10%   82.10%           
=======================================
  Files          20       20           
  Lines        2816     2817    +1     
  Branches      516      516           
=======================================
+ Hits         2312     2313    +1     
  Misses        373      373           
  Partials      131      131           

Impacted Files	Coverage Δ
jupyter_releaser/changelog.py	72.72% <100.00%> (ø)
jupyter_releaser/lib.py	80.68% <100.00%> (+0.06%)	⬆️

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[blink1073]

Thanks!