Fix infinite loop on cache file read error.

[JimBobSquarePants]

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Description

Pass the missed true parameter to the Invoke method to allow retrying a command while allowing a short-circuit.

See #257 for a reference.

[codecov]

Codecov Report

Merging #264 (7062618) into main (607c6a9) will decrease coverage by 0%.
The diff coverage is 0%.

@@         Coverage Diff         @@
##           main   #264   +/-   ##
===================================
- Coverage    85%    85%   -1%     
===================================
  Files        75     75           
  Lines      2036   2036           
  Branches    298    298           
===================================
- Hits       1741   1739    -2     
- Misses      211    213    +2     
  Partials     84     84           

Flag	Coverage Δ
unittests	85% <0%> (-1%)	⬇️

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Impacted Files	Coverage Δ
.../ImageSharp.Web/Middleware/ImageSharpMiddleware.cs	81% <0%> (ø)
.../Synchronization/RefCountedConcurrentDictionary.cs	72% <0%> (-4%)	⬇️

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