fix: Remove divider from NS Ticket Office booking platform

[MoritzWeber0]

Resolves #362

[github-actions]

Hi there! 👋

Thank you for your contribution to the FIP Guide! 🚀
We appreciate your effort in making rail staff travel information more accessible. 🚄

Checklist before merging:

• Added a description to the Pull Request
• Checked the License of new pictures (non-commercial use without attribution)
• Modified content in English
• Modified content in German
• Modified content in French

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[lenderom]

Why is this here a H4 and in all other booking sites we use a H2?

[MoritzWeber0]

Why is this here a H4 and in all other booking sites we use a H2?

For booking platforms, H2 is correct to match the structure of the headings tree. The headings are directly below the main title of booking platform. When they are embedded in the operator pages, they should fit to the structure of the page; the H2 elements are transformed to H4. This transformation doesn't happen for the headings directly defined as content of the booking expander on the operator page, only the rendered content is transformed.