[PM-1816] Remove TLS 1.1 from sys logger

[lightswitch05]

Type of change

- [ ] Bug fix
- [ ] New feature development
- [x] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

TLSv1.1 was deprecated on March 2021 by RFC-8996 and should no longer be used due the usage of SHA-1 hashes. The objective of this PR is to exclude it as a valid option for the syslog connection.

Code changes

• LoggerFactoryExtensions.cs: Remove SslProtocols.Tls11 as a supported SslProtocol.

Before you submit

• Please check for formatting errors (dotnet format --verify-no-changes) (required)
• If making database changes - make sure you also update Entity Framework queries and/or migrations
• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team

[bitwarden-bot]

Thank you for your contribution! We've added this to our internal Community PR board for review. ID: PM-1816

[justindbaur]

This change was done in #3798.