Why does .NET 10 require explicit installation of libgssapi-krb5-2 when Ubuntu already includes Kerberos?

[Varorbc]

1. Ubuntu Kerberos note
   Ubuntu already includes Kerberos libraries by default (including GSSAPI).

2. .NET 10 dependency list
   libgssapi-krb5-2 is listed as a required dependency that must be explicitly installed.
   

   core/release-notes/10.0/dotnet-dependencies.md

   Line 413 in 44c196d

   libgssapi-krb5-2 \

3. But the official .NET 10 runtime-deps image does NOT install this library:
   https://github.com/dotnet/dotnet-docker/blob/main/src/runtime-deps/10.0/resolute/amd64/Dockerfile

If Ubuntu already ships Kerberos, and the official runtime-deps image does not install libgssapi-krb5-2, why does the .NET 10 dependency documentation say this library must be explicitly installed?