build: fix Build of Compiler-Extension

[Flash0ver]

Follow-up to #4800,
as it was causing a build error ... sometimes:

dotnet build

Build FAILED.

CSC : error CS2012: Cannot open 'D:\a\sentry-dotnet\sentry-dotnet\src\Sentry.Compiler.Extensions\obj\Release\netstandard2.0\Sentry.Compiler.Extensions.dll' for writing -- The process cannot access the file 'D:\a\sentry-dotnet\sentry-dotnet\src\Sentry.Compiler.Extensions\obj\Release\netstandard2.0\Sentry.Compiler.Extensions.dll' because it is being used by another process.; file may be locked by 'VBCSCompiler' (8484) [D:\a\sentry-dotnet\sentry-dotnet\src\Sentry.Compiler.Extensions\Sentry.Compiler.Extensions.csproj]
    0 Warning(s)
    1 Error(s)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 73.80%. Comparing base (3c5bdb8) to head (a9f1a69).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4804   +/-   ##
=======================================
  Coverage   73.79%   73.80%           
=======================================
  Files         483      483           
  Lines       17547    17547           
  Branches     3460     3460           
=======================================
+ Hits        12949    12950    +1     
  Misses       3746     3746           
+ Partials      852      851    -1     

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