Add doc to show logs to trace correlation

[cijothomas]

Fixes #.

Changes

Please provide a brief description of the changes here.

For significant contributions please make sure you have completed the following items:

• Appropriate CHANGELOG.md updated for non-trivial changes
• Design discussion issue #
• Changes in public API reviewed

[codecov]

Codecov Report

Merging #3288 (c3e7a41) into main (eb8844a) will increase coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #3288      +/-   ##
==========================================
+ Coverage   85.41%   85.59%   +0.17%     
==========================================
  Files         263      263              
  Lines        9487     9487              
==========================================
+ Hits         8103     8120      +17     
+ Misses       1384     1367      -17     

Impacted Files	Coverage Δ
...emetry.Api/Internal/OpenTelemetryApiEventSource.cs	79.41% <0.00%> (-2.95%)	⬇️
...metryProtocol/Implementation/ActivityExtensions.cs	95.62% <0.00%> (+4.37%)	⬆️
...xporter.OpenTelemetryProtocol/OtlpTraceExporter.cs	77.27% <0.00%> (+18.18%)	⬆️
...entation/ExportClient/OtlpGrpcTraceExportClient.cs	78.57% <0.00%> (+28.57%)	⬆️
src/OpenTelemetry.Api/BaseProvider.cs	100.00% <0.00%> (+33.33%)	⬆️