Logging: Fix example docs.

[pmakani]

No description provided.

[codecov]

Codecov Report

Merging #6130 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@ Coverage Diff @@## master #6130 +/- ##
============================================
- Coverage 47.38% 47.38% -0.01% - Complexity 27182 27197 +15 
============================================
Files 2523 2523 Lines 274600 274600 Branches 31383 31378 -5 ============================================
- Hits 130125 130124 -1 - Misses 134862 134863 +1 
Partials 9613 9613

Impacted Files	Coverage Δ	Complexity Δ
...rc/main/java/com/google/cloud/logging/Logging.java	100% <ø> (ø)	0 <0> (ø)	⬇️
...ain/java/com/google/cloud/pubsub/v1/Publisher.java	89.11% <0%> (-0.35%)	40% <0%> (ø)

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