Flaky FailwithBadUsage test

[knocte]

CI log run: https://github.com/fsprojects/FSharpLint/actions/runs/27011603121/job/79717968224

Quoting:

Starting task 'DotNet:test': tests/FSharpLint.Core.Tests
/home/runner/work/FSharpLint/FSharpLint> "dotnet"  test tests/FSharpLint.Core.Tests --filter "\"TestCategory!=Performance\"" --configuration Release /nodeReuse:False /clp:ForceConsoleColor /bl:/tmp/tmpOxZGhO.tmp.binlog (In: false, Out: false, Err: false)
  Determining projects to restore...
  All projects are up-to-date for restore.
  FSharpLint.Core -> /home/runner/work/FSharpLint/FSharpLint/src/FSharpLint.Core/bin/Release/net9.0/FSharpLint.Core.dll
  FSharpLint.Core.Tests -> /home/runner/work/FSharpLint/FSharpLint/tests/FSharpLint.Core.Tests/bin/Release/net9.0/FSharpLint.Core.Tests.dll
Test run for /home/runner/work/FSharpLint/FSharpLint/tests/FSharpLint.Core.Tests/bin/Release/net9.0/FSharpLint.Core.Tests.dll (.NETCoreApp,Version=v9.0)
VSTest version 17.14.1 (x64)

Starting test execution, please wait...
A total of 1 test files matched the specified pattern.
  Failed FailwithWithBadArgumentsDuplicateExceptionMessage [583 ms]
  Error Message:
     Expected: True
  But was:  False

  Stack Trace:
     at FSharpLint.Core.Tests.Rules.Conventions.FailwithBadUsage.TestConventionsFailwithBadUsage.FailwithWithBadArgumentsDuplicateExceptionMessage() in /home/runner/work/FSharpLint/FSharpLint/tests/FSharpLint.Core.Tests/Rules/Conventions/FailwithBadUsage.fs:line 72

1)    at FSharpLint.Core.Tests.Rules.Conventions.FailwithBadUsage.TestConventionsFailwithBadUsage.FailwithWithBadArgumentsDuplicateExceptionMessage() in /home/runner/work/FSharpLint/FSharpLint/tests/FSharpLint.Core.Tests/Rules/Conventions/FailwithBadUsage.fs:line 72


  Skipped Error for named tuple with spaces around colon [< 1 ms]

Failed!  - Failed:     1, Passed:  1003, Skipped:     1, Total:  1005, Duration: 1 m 44 s - FSharpLint.Core.Tests.dll (net9.0)
Finished (Failed) 'DotNet:test' in 00:01:48.0136654
Finished (Failed) 'Test' in 00:01:48.0142984

---------------------------------------------------------------------
Build Time Report
---------------------------------------------------------------------
Target     Duration
------     --------
Clean      00:00:00.0014844
Build      00:00:05.0798922
Test       00:01:48.0141979   (Exception of type 'Fake.DotNet.MSBuildException' was thrown.)
Default    00:00:00           (skipped)
Pack       00:00:00           (skipped)
Total:     00:01:53.1485601
Status:    Failure
---------------------------------------------------------------------
Fake.Core.BuildFailedException: Target 'Test' failed.
 ---> System.AggregateException: One or more errors occurred. (Exception of type 'Fake.DotNet.MSBuildException' was thrown.)
 ---> 'dotnet test tests/FSharpLint.Core.Tests' failed with exit code 1.

   --- End of inner exception stack trace ---
   --- End of inner exception stack trace ---
   at Fake.Core.TargetModule.raiseIfError(OptionalTargetContext context) in D:\a\FAKE\FAKE\src\app\Fake.Core.Target\Target.fs:line 1319
   at Fake.Core.TargetModule.runOrDefaultWithArguments(String defaultTarget) in D:\a\FAKE\FAKE\src\app\Fake.Core.Target\Target.fs:line 1542
   at <StartupCode$FSI_0002>.$FSI_0002.main@() in /home/runner/work/FSharpLint/FSharpLint/build.fsx:line 322
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Void** arguments, Signature sig, Boolean isConstructor)
   at System.Reflection.MethodBaseInvoker.InvokeWithNoArgs(Object obj, BindingFlags invokeAttr)
Stopped due to error
Error: Process completed with exit code 1.