Microsoft.IdentityModel.Tokens.SecurityAlgorithms docs not available for .NET 6

**Help us make content visible**
When I go to docs website for `SecurityAlgorithms` class and select `.NET 6` from dropdown on the left I get message ` The requested page is not available for .NET 6. You have been redirected to the newest product version this page is available for.` even though this class is available in my ASP.NET Core project.

Link to reproduce the issue:
https://learn.microsoft.com/en-us/dotnet/api/system.identitymodel.tokens.securityalgorithms?view=netframework-4.8.1&viewFallbackFrom=net-6.0

**Describe the new article**
Article for `Microsoft.IdentityModel.Tokens.SecurityAlgorithms` should be added for `.NET 6` (and other versions of `.NET`) because there are some differences between fields in this class between `.NET Framework` and `.NET` versions. For example these:
```
public const string EcdsaSha256 = "ES256";

public const string EcdsaSha384 = "ES384";

public const string EcdsaSha512 = "ES512";

public const string HmacSha256 = "HS256";

public const string HmacSha384 = "HS384";

public const string HmacSha512 = "HS512";
```

Inizia dalla pagina API collegata Microsoft.IdentityModel.Tokens.SecurityAlgorithms e confronta la relativa disponibilità e i campi in .NET Framework e .NET 6. Il lavoro è completato quando la documentazione di SecurityAlgorithms è disponibile per .NET 6 e per le altre versioni di .NET applicabili, comprese le costanti specifiche della versione descritte nell’issue.

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