docs: fix outdated examples/README.md

[portwatcher]

tracing-jaeger is no longer existed in opentelemetry-rust/examples

[linux-foundation-easycla]

• ❌ - login: @portwatcher / name: Jury Schon . The commit (9861340) is not authorized under a signed CLA. Please click here to be authorized. For further assistance with EasyCLA, please submit a support request ticket.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.1%. Comparing base (1f0d9a9) to head (9861340).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3026   +/-   ##
=====================================
  Coverage   81.1%   81.1%           
=====================================
  Files        126     126           
  Lines      24954   24954           
=====================================
  Hits       20255   20255           
  Misses      4699    4699           

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[cijothomas]

@portwatcher Could you sign the CLA, which is a mandatory, onetime requirement before accepting contributions. You may want to consult your employer, if contributing on behalf of.