KB, not bytes

Based on this, it looks like this value is is kn KB, not bytes:

https://referencesource.microsoft.com/#System.Web/Configuration/HttpRuntimeSection.cs,8f1d17aef83ea852,references

---
#### Document Details

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* ID: 13cf8a58-9e1d-0517-39f0-002c1a5616ac
* Version Independent ID: 38bf872c-6ab5-5b65-a038-d3c90f341539
* Content: [HttpRuntimeSection.RequestLengthDiskThreshold Property (System.Web.Configuration)](https://docs.microsoft.com/en-us/dotnet/api/system.web.configuration.httpruntimesection.requestlengthdiskthreshold?view=netframework-4.7.2)
* Content Source: [xml/System.Web.Configuration/HttpRuntimeSection.xml](https://github.com/dotnet/dotnet-api-docs/blob/master/xml/System.Web.Configuration/HttpRuntimeSection.xml)
* Product: **dotnet-api**
* GitHub Login: @dotnet-bot
* Microsoft Alias: **dotnetcontent**

Apri xml/System.Web.Configuration/HttpRuntimeSection.xml e rivedi la documentazione di RequestLengthDiskThreshold insieme al codice sorgente di riferimento collegato. Aggiorna la documentazione per indicare l’unità corretta, quindi verifica che la descrizione della proprietà corrisponda chiaramente al comportamento di riferimento.

Scritto dal modello di indicizzazione a partire dal testo della issue.