Bump nuget.exe to 6.6.2

[libs][TimeZoneInfo] Bound transition time conversion (mono#21686)

Co-authored-by: mdh1418 <[email protected]>

[Mono.Security] Add additional validation to AuthenticodeDeformatter

Check that the Extended Key Usage extension in the signing certificate contains the OID for code signing so that we reject other types of certificates.

Bump nuget.exe to v6.6.1