Nit fix to log message on LogProcessor

[cijothomas]

Fixes #
Design discussion issue (if applicable) #

Changes

Please provide a brief description of the changes here.

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 79.5%. Comparing base (aece641) to head (b458c24).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
opentelemetry-sdk/src/logs/log_processor.rs	0.0%	5 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2590   +/-   ##
=====================================
  Coverage   79.5%   79.5%           
=====================================
  Files        118     118           
  Lines      22480   22480           
=====================================
  Hits       17878   17878           
  Misses      4602    4602           

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