Fix InvalidOperation in workflow

[martincostello]

• Fix InvalidOperation from PowerShell if exactly one .csproj file is found.
• Rebuild the contents of dist.

Error fixed:

$projectFiles += Get-ChildItem -Path "." -Filter "*.fsproj" -Recurs …
     |    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Method invocation failed because [System.IO.FileInfo] does not contain a
     | method named 'op_Addition'.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.65%. Comparing base (a90602e) to head (b04ed49).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #877   +/-   ##
=======================================
  Coverage   93.65%   93.65%           
=======================================
  Files           2        2           
  Lines         394      394           
  Branches       78       78           
=======================================
  Hits          369      369           
  Misses         23       23           
  Partials        2        2           

Flag	Coverage Δ
linux	93.65% <ø> (ø)
macos	?
windows	?

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