Fix docs

[LukasFehring]

Reference Issues/PRs

Mkdocs was updated, but the config file was not updated accordingly. Therefore, #1281 failed upon calling make docs

Changes

I updated the mkdocs.yaml

Type Of Changes

What types of changes does your code introduce? Put an x in all the boxes that apply:

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

Checklist

Go over all the following points, and put an x in all the boxes that apply.
Should there be a good argument to differ, please provide a reasoned explanation.

• My change is based on the latest stage of the develop branch.
• My change required a change of the documentation, which has been done.
• I checked that the documentation can be build, visualizes everything as expected, and does not contain any warnings.
• I have added/adapted tests to cover my changes.
• The tests can be executed successfully.
• I have added a description of the changes to CHANGELOG.rst.

All the other points on the Checklist are not appropriate for this fix.

[mwever]

LG2M