Fix a typo in the changelog

[ansman]

Fixed a typo in the work changelog

[codecov]

Codecov Report

Merging #5481 into 2.x will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #5481      +/-   ##
============================================
- Coverage     96.09%   96.06%   -0.04%     
  Complexity     5800     5800              
============================================
  Files           631      631              
  Lines         41297    41297              
  Branches       5743     5743              
============================================
- Hits          39685    39671      -14     
- Misses          635      640       +5     
- Partials        977      986       +9

Impacted Files	Coverage Δ	Complexity Δ
.../operators/observable/ObservableFlatMapSingle.java	88.8% <0%> (-4.48%)	2% <0%> (ø)
...ternal/operators/observable/ObservablePublish.java	89.47% <0%> (-4.39%)	9% <0%> (-1%)
.../internal/operators/maybe/MaybeTakeUntilMaybe.java	95.91% <0%> (-4.09%)	2% <0%> (ø)
...nternal/operators/parallel/ParallelReduceFull.java	91.17% <0%> (-3.93%)	2% <0%> (ø)
...l/operators/observable/ObservableFlatMapMaybe.java	87.58% <0%> (-3.27%)	2% <0%> (ø)
...ternal/operators/completable/CompletableCache.java	96.96% <0%> (-3.04%)	23% <0%> (-1%)
.../internal/operators/flowable/FlowableInterval.java	94.44% <0%> (-2.78%)	3% <0%> (ø)
...activex/internal/observers/QueueDrainObserver.java	61.53% <0%> (-2.57%)	12% <0%> (-1%)
.../main/java/io/reactivex/subjects/MaybeSubject.java	97.82% <0%> (-2.18%)	47% <0%> (-1%)
...reactivex/internal/operators/maybe/MaybeUsing.java	93.93% <0%> (-2.03%)	4% <0%> (ø)
... and 37 more

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