[dotnet] Correct ChromiumDriverService.AllowedIPAddresses property name

[YevgeniyShunevych]

Description

This is a correction of commit e7fb98b made in v4.18. If you check that commit changes, you should see that the old property WhitelistedIPAddresses actually was renamed, I believe accidentally, to WhitelistedIpAddresses marked with [Obsolete] attribute. IP -> Ip. So it turned to a breaking change that was not intended to be. So I renamed that old property back. Additionally, actual new AllowedIpAddresses property doesn't follow C# naming convention with Ip. So I corrected it to have IP as well.

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[diemol]

Thank you, @YevgeniyShunevych!

[YevgeniyShunevych]

No problem, @diemol. I think maybe you can even consider releasing this as v4.18.2.