Fix broken links (issue #1227)

[calvin-zeu]

Fixing #1227.
Link seems to be a duplicate of the cd.cz-link (28162) with a typo (28762). All sources seem to be correctly referenced.

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[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

[therobrob]

Thanks! Unfortunately, the link itself is broken and leads to a 404-page

[MoritzWeber0]

Thanks! Unfortunately, the link itself is broken and leads to a 404-page

For me, the new link works with the trailing slash :)