Remove legacy cross topic references with .md suffix

[dobromirts]

Task type

• New topic / component documentation
• Update existing topic (new release, API change, new feature)
• Add missing platform variant (Angular / React / WebComponents / Blazor)
• Improve existing content (clarity, examples, structure)
• Add or update code samples
• Other

Platform(s)

• Angular
• React
• WebComponents
• Blazor
• All platforms

Description

Review and update legacy cross-topic references that use the .md file extension. References such as:

• chart-annotations.md
• chart-highlighting.md

should be converted to extensionless links or updated to use the .mdx extension, depending on the current documentation standards and tooling requirements.

The existing .md references do not resolve correctly in Visual Studio context and may lead to broken navigation when opening linked topics. Updating these links will ensure consistent cross-topic navigation, improve compatibility with the documentation build system, and allow topics to be opened correctly in development environments.

Acceptance criteria

No response

Related resources

No response