Highlight the lines that violate a guideline in the bad examples (and the fixed lines in the good examples)

[PhilippSalvisberg]

In v4.3. the code snippets in the bad and good examples became more extensive and it is not easy to spot the line that violates the guideline.

Material for Mkdocs supports highlighting specific lines. This feature should be used for SQL code blocks to highlight the relevant lines.

It might be necessary to update the versions used in the docker image.