Fix typos

[yeger00]

Hello,
Here are 4 typos I found when looking in the documentation of Logfire.
I hope that's fine with you.

Thanks,
Avi

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (f620780) to head (3064e2a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #479   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          131       131           
  Lines         9783      9783           
  Branches      1290      1290           
=========================================
  Hits          9783      9783           

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[Kludex]

Thanks :)