HttpRequestBuffering_DoesNotBufferDisabledOrOversizedLogs failure in internal build

Test: Microsoft.AspNetCore.Diagnostics.Logging.Test.AcceptanceTests.HttpRequestBuffering_DoesNotBufferDisabledOrOversizedLogs
Test file: microsoft.aspnetcore.diagnostics.middleware.tests.dll
Machine: 612af21ac000000
Tested build: [20251212.1](https://dev.azure.com/dnceng/internal/_Build?_a=summary&buildId=2859951)

```
Error message
Assert.Equal() Failure: Values differ
Expected: 6
Actual: 7

Stack trace
at Microsoft.AspNetCore.Diagnostics.Logging.Test.AcceptanceTests.<>c.<b__24_1>d.MoveNext() in /mnt/vss/_work/1/s/test/Libraries/Microsoft.AspNetCore.Diagnostics.Middleware.Tests/Logging/AcceptanceTests.cs:line 950
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Diagnostics.Logging.Test.AcceptanceTests.RunAsync[TStartup](LogLevel level, Action`1 configure, Func`4 func) in /mnt/vss/_work/1/s/test/Libraries/Microsoft.AspNetCore.Diagnostics.Middleware.Tests/Logging/AcceptanceTests.cs:line 175
at Microsoft.AspNetCore.Diagnostics.Logging.Test.AcceptanceTests.HttpRequestBuffering_DoesNotBufferDisabledOrOversizedLogs() in /mnt/vss/_work/1/s/test/Libraries/Microsoft.AspNetCore.Diagnostics.Middleware.Tests/Logging/AcceptanceTests.cs:line 898
--- End of stack trace from previous location ---
```