Broken existing structure link in Test-data Specifications

[eweizy]

Describe the bug The hyperlink to existing structure in the 2.1 Module test data organisation subsection is broken.

To Reproduce Steps to reproduce the behavior:

1. Go to 'https://nf-co.re/docs/contributing/nfcore_component-specifications/test_data#21-module-test-data-organisation'
2. Click on 'existing structure'

Expected behavior The expected behavior is to land on the existing structure documentation after clicking on the existing structure link

Screenshots

Browser (please complete the following information):

• OS: iOS
• Browser: chrome
• Version: 123.0.6312.107 (Official Build) (x86_64)

Additional context