[Docs] Outdated BenchmarkDotNet.TestAdapter version in vstest.md example

[Shrinidhi203]

Description

The VSTest documentation example shows an outdated package version that may confuse users.

Location

File: docs/articles/features/vstest.md, line 76
https://github.com/dotnet/BenchmarkDotNet/blob/master/docs/articles/features/vstest.md#L76

Current (incorrect)

<PackageReference Include="BenchmarkDotNet.TestAdapter" Version="0.13.12" />

Expected

Should reference the current version:
<PackageReference Include="BenchmarkDotNet.TestAdapter" Version="0.16.0" />

Additional suggestion

Line 85 mentions "Rider/R# 2023.3" - this may also need updating to reflect newer versions where VSTest support is
enabled by default.