Fix reference to SslCertificateTrust on Ssl*AuthenticationOptions

[rzikm]

Fixes #10504.

[dotnet-policy-service]

Tagging subscribers to this area: @dotnet/ncl

[learn-build-service-prod]

Learn Build status updates of commit 2e9a5bf:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Security/SslClientAuthenticationOptions.xml	✅Succeeded	View
xml/System.Net.Security/SslServerAuthenticationOptions.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel

[gewarren]

Left a suggestion to convert to bullets, for consideration.

[learn-build-service-prod]

Learn Build status updates of commit 0bdf9e4:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Net.Security/SslClientAuthenticationOptions.xml	✅Succeeded	View
xml/System.Net.Security/SslServerAuthenticationOptions.xml	✅Succeeded	View

For more details, please refer to the build report.

For any questions, please:

• Try searching the learn.microsoft.com contributor guides
• Post your question in the Learn support channel