Updated: Updated documentation links to new locations

Hello,

We have made just a small improvement to the page links. The documentation links were outdated and pointed to the old locations. With this pull request commit we have updated the links to point to the new / current locations.

Details
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We noticed one of the documentation links has become invalid and wondered if you could help us get it updated and fixed?

In the section 'Documentation' the link 'Legacy Docs' has become invalid it points to 'http://doc.ez.no/' but today due to recent changes it should point to 'https://doc.ez.no/eZ-Publish/' instead.

Also in the section 'Documentation' the link '5.x Docs' has become invalid it points to 'http://confluence.ez.no/' but today due to recent changes it should point to 'https://doc.ez.no/' instead.

Closing
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We think this pull request is important to help people navigate directly to the docs the need. Please let us know what you think.

Thank you for your continued support!

Cheers,
Brookins Consulting