Fix ObfuscatedLoggerProvider Javadoc copy-paste example

[thswlsqls]

Description

• ObfuscatedLoggerProvider's class Javadoc example was copy-pasted from ObfuscatedMeterProvider and still referenced (SdkMeterProvider) openTelemetry.getMeterProvider().
• Changed it to (SdkLoggerProvider) openTelemetry.getLogsBridge(), the pattern this class actually guards against — it wraps SdkLoggerProvider and is exposed via getLogsBridge().
• The sibling classes (ObfuscatedTracerProvider, ObfuscatedMeterProvider) each point at their own type; only the logger one was wrong.
• Introduced in Promote log API / SDK to stable #5341.

Testing done

• Docs-only, test-exempt: Javadoc text only, no behavior/signature/public API change.
• ./gradlew :sdk:all:check passed (test + spotlessCheck + ErrorProne/NullAway + jApiCmp).
• jApiCmp reported no public API changes, so no apidiff update; no CHANGELOG entry (not user-facing).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.64%. Comparing base (09d6c17) to head (f12d215).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8639   +/-   ##
=========================================
  Coverage     91.64%   91.64%           
  Complexity    10348    10348           
=========================================
  Files          1013     1013           
  Lines         27380    27380           
  Branches       3218     3218           
=========================================
  Hits          25092    25092           
  Misses         1558     1558           
  Partials        730      730           

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[opentelemetry-pr-dashboard]

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