downgrades analyzers to address compiler version conflict temporarily

[ebozduman]

This PR is to temporarily address the compiler mismatch issue the latest Roslynator analyzer version upgrade caused by simply downgrading those 2 analyzer packages.

CSC : error CS9057: The analyzer assembly '.../.nuget/packages/roslynator.analyzers/4.6.4/analyzers/dotnet/cs/Roslynator.CSharp.Analyzers.dll' references version '4.6.0.0' of the compiler, which is newer than the currently running version '4.4.0.0'. [.../ersan/work/src/github.com/minio/minio-dotnet/Minio/Minio.csproj::TargetFramework=net6.0]
CSC : error CS9057: The analyzer assembly '.../.nuget/packages/roslynator.formatting.analyzers/4.6.4/analyzers/dotnet/cs/Roslynator.Formatting.Analyzers.dll' references version '4.6.0.0' of the compiler, which is newer than the currently running version '4.4.0.0'. [.../work/src/github.com/minio/minio-dotnet/Minio/Minio.csproj::TargetFramework=net6.0]