Remove extra : in toast notification when there's no body

[ryan-pratt]

This way it's just {title} instead of {title}:. The : is still there when there's a body

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.16%. Comparing base (b98c9bf) to head (ad29747).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2074      +/-   ##
==========================================
+ Coverage   79.15%   79.16%   +0.01%     
==========================================
  Files         631      631              
  Lines       47536    47536              
  Branches      754      754              
==========================================
+ Hits        37627    37632       +5     
+ Misses       9826     9821       -5     
  Partials       83       83              

Flag	Coverage Δ
python	84.15% <ø> (+0.04%)	⬆️
ruby-api	71.36% <ø> (ø)
ruby-backend	82.91% <ø> (-0.01%)	⬇️

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