2x: Fix wording in Async and Publish processors javadoc.

[serj-lotutovici]

Seams that these are some leftovers from the 1.x -> 2.x refactoring.

[akarnokd]

"A Processor" ?

[serj-lotutovici]

In Replay and Behaviour processors it's "Processor" _(ツ)_/¯. Both seam syntactically correct.

[akarnokd]

Then the AsyncProcessor could be adjusted as well.

[serj-lotutovici]

done

[codecov]

Codecov Report

Merging #5444 into 2.x will increase coverage by 0.07%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #5444      +/-   ##
============================================
+ Coverage     95.96%   96.04%   +0.07%     
- Complexity     5793     5794       +1     
============================================
  Files           631      631              
  Lines         41297    41297              
  Branches       5744     5744              
============================================
+ Hits          39632    39662      +30     
+ Misses          663      654       -9     
+ Partials       1002      981      -21

Impacted Files	Coverage Δ	Complexity Δ
...n/java/io/reactivex/processors/AsyncProcessor.java	99.15% <ø> (ø)	56 <0> (ø)	⬇️
...java/io/reactivex/processors/PublishProcessor.java	98.29% <ø> (ø)	45 <0> (ø)	⬇️
...a/io/reactivex/processors/SerializedProcessor.java	89.36% <0%> (-8.52%)	26% <0%> (-2%)
.../java/io/reactivex/subjects/SerializedSubject.java	87.36% <0%> (-8.43%)	25% <0%> (-2%)
...vex/internal/operators/single/SingleTakeUntil.java	88.52% <0%> (-6.56%)	2% <0%> (ø)
.../operators/completable/CompletableConcatArray.java	93.75% <0%> (-6.25%)	2% <0%> (ø)
...perators/flowable/FlowableSequenceEqualSingle.java	94.91% <0%> (-5.09%)	3% <0%> (ø)
...ernal/operators/maybe/MaybeTakeUntilPublisher.java	96% <0%> (-4%)	2% <0%> (ø)
...al/operators/flowable/FlowableSamplePublisher.java	93.61% <0%> (-3.2%)	3% <0%> (ø)
...x/internal/operators/maybe/MaybeSwitchIfEmpty.java	97.22% <0%> (-2.78%)	2% <0%> (ø)
... and 38 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 14a83b3...34c4858. Read the comment docs.