Update to .NET 11 preview 5

[martincostello]

Update to preview 5 of .NET 11.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.16%. Comparing base (9923b84) to head (2b6897a).
⚠️ Report is 1 commits behind head on dotnet-vnext.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##           dotnet-vnext    #3107   +/-   ##
=============================================
  Coverage         96.16%   96.16%           
=============================================
  Files               311      311           
  Lines              7139     7139           
  Branches           1006     1006           
=============================================
  Hits               6865     6865           
  Misses              221      221           
  Partials             53       53           

Flag	Coverage Δ
linux	96.16% <ø> (ø)
macos	96.16% <ø> (ø)
windows	96.15% <ø> (ø)

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