chore: minor examples cleanup

[gammazero]

• Pass time.Duration instead of passing int that gets converted to time.Duration.
• Remove unneeded else clauses
• spelling

[codecov]

Codecov Report

Attention: Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 60.37%. Comparing base (caa6763) to head (89c8b8c).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
examples/routing/delegated-routing-client/main.go	62.50%	3 Missing ⚠️

@@            Coverage Diff             @@
##             main     #736      +/-   ##
==========================================
- Coverage   60.40%   60.37%   -0.03%     
==========================================
  Files         244      244              
  Lines       31028    31029       +1     
==========================================
- Hits        18741    18735       -6     
- Misses      10617    10624       +7     
  Partials     1670     1670              

Files with missing lines	Coverage Δ
examples/routing/delegated-routing-client/main.go	55.65% <62.50%> (+1.26%)	⬆️

... and 14 files with indirect coverage changes