Broken internal and external links

[jenkin]

Page in production: https://playbook.sparkfabrik.com/organization/roles-accountabilities

Section: CLIENT SATISFACTION

Broken link: https://www.sparkfabrik.com/en/who-we-are.html

The client is not always right, or they would not turn to us to solve their problems. Still, we value technical quality and good human relations over anything else. Be kind and clear, explain your positions, and always focus on customer needs, with open ears and a bright smile. Everybody is called to ultimately deliver a great customer experience.

[jenkin]

Issues not yet resolved by #170:

• /organization/role-isc-supporter.md, role-isc-lead-developer.md, and role-isc-professional.md are missing,
• test for link to Udemy homepage fails, but it should work,
• all automatic tests for links to https://www.drupal.org/docs/ pages are blocked because of suspicious.