Set MD 0055 and MD 0056 to false in markdown lint config

[mattwojo]

Fixes #

Docs for Toolkit PR #

What changes to the docs does this PR provide?

PR Checklist

Please check if your PR fulfills the following requirements:

• Correctly picked the right branch to base the change off (dev for new features, main for typos/improvements)
• For new pages, used the provided template
• For new features, added an entry in the Table of Contents
• Ran against a spell and grammar checker
• Contains NO breaking changes

Other information

[learn-build-service-prod]

Learn Build status updates of commit e8d3ebe:

✅ Validation status: passed

File	Status	Preview URL	Details
.markdownlint.json	✅Succeeded

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

[learn-build-service-prod]

Learn Build status updates of commit e8d3ebe:

✅ Validation status: passed

File	Status	Preview URL	Details
.markdownlint.json	✅Succeeded

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