housekeeping: Updated Cake to v0.38.1

[RLittlesII]

What kind of change does this PR introduce?

Updates Cake to v0.38.1

What is the current behavior?

The most updated version of ReactiveUI.Cake.Recipe is broken

What is the new behavior?

The ReactiveUI.Cake.Recipe works

What might this PR break?

Nothing

Please check if the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

Other information:

[codecov]

Codecov Report

Merging #583 into master will decrease coverage by 2.42%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #583      +/-   ##
==========================================
- Coverage   53.24%   50.82%   -2.43%     
==========================================
  Files          56       56              
  Lines        3345     3343       -2     
  Branches      528      551      +23     
==========================================
- Hits         1781     1699      -82     
- Misses       1390     1459      +69     
- Partials      174      185      +11     

Impacted Files	Coverage Δ
...rc/Akavache.Core/Platforms/shared/Registrations.cs	42.85% <0.00%> (-42.86%)	⬇️
src/Akavache.Sqlite3/Registrations.cs	40.74% <0.00%> (-33.34%)	⬇️
...rc/Akavache.Core/KeyedOperations/KeyedOperation.cs	85.71% <0.00%> (-14.29%)	⬇️
...Sqlite3/Operations/InvalidateAllSqliteOperation.cs	85.71% <0.00%> (-14.29%)	⬇️
...kavache.Core/Platforms/shared/AkavacheHttpMixin.cs	28.00% <0.00%> (-8.00%)	⬇️
...qlite3/Operations/BulkInvalidateSqliteOperation.cs	89.36% <0.00%> (-6.39%)	⬇️
src/Akavache.Sqlite3/Queues/OperationQueue.cs	87.63% <0.00%> (-5.31%)	⬇️
src/Akavache.Core/BlobCache/BlobCache.cs	22.22% <0.00%> (-4.77%)	⬇️
...ite3/Operations/BeginTransactionSqliteOperation.cs	85.71% <0.00%> (-4.77%)	⬇️
...te3/Operations/CommitTransactionSqliteOperation.cs	85.71% <0.00%> (-4.77%)	⬇️
... and 12 more

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[github-actions]

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