chore: replace live server by five server

[yandeu]

Description

Replaced Live Server by Five Server in the site-rebrand-tutorial.

Motivation & context

Five Server is a fork of Live Server with updated dependencies and fixed vulnerabilities.
In addition, it provides features like instant update, highlight and remote logging.

Issue type checklist

• Chore: A change that does not impact distributed packages.
• Bug fix: A change that fixes an issue, link to the issue above.
• New feature: A change that adds functionality.

Is this a breaking change?

• This change causes current functionality to break.

Adding or modifying component(s) in @microsoft/fast-components checklist

• I have added a new component
• I have modified an existing component
• I have updated the definition file
• I have updated the configuration file

Process & policy checklist

• I have added tests for my changes.
• I have tested my changes.
• I have updated the project documentation to reflect my changes.
• I have read the CONTRIBUTING documentation and followed the standards for this project.

[EisenbergEffect]

Sounds good to me!

[codeclimate]

Code Climate has analyzed commit 2f59124 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 85.2% (0.0% change).

View more on Code Climate.