Update links to Algolia documentation in configuration guide

[dreitzner]

Types of changes

• [x] Bug fix (a non-breaking change which fixes an issue)
• [ ] New feature (a non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Description

Algolia recently updated their docs. The change in link structure caused some of the links to no longer work.

Checklist:

• [x] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes (if not applicable, please state why) => only update to doczumentation