Update QualityWebProcessor.cs docs

[deanmarcussen]

Prerequisites

• I have written a descriptive pull-request title
• I have verified that there are no overlapping pull-requests open
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• I have provided test coverage for my change (where applicable)

Description

Just updating some docs

[codecov]

Codecov Report

Merging #253 (49539d3) into main (02ea785) will increase coverage by 0%.
The diff coverage is n/a.

@@         Coverage Diff         @@
##           main   #253   +/-   ##
===================================
  Coverage    85%    85%           
===================================
  Files        75     75           
  Lines      2036   2036           
  Branches    298    298           
===================================
+ Hits       1739   1743    +4     
+ Misses      213    210    -3     
+ Partials     84     83    -1     

Flag	Coverage Δ
unittests	85% <ø> (+<1%)	⬆️

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Impacted Files	Coverage Δ
...c/ImageSharp.Web/Processors/QualityWebProcessor.cs	97% <ø> (ø)
...ching/LruCache/ConcurrentTLruCache{TKey,TValue}.cs	45% <0%> (+1%)	⬆️
.../Synchronization/RefCountedConcurrentDictionary.cs	76% <0%> (+4%)	⬆️

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[JimBobSquarePants]

Thanks!