Fix missing anchors on Markdown headings

What does this MR do?

This is another attempt at solving the issue that !24181 (merged) tried to address, #27142 (closed).

Screenshots

Forced that image to be 200px tall and floated right.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• [] Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done