"Last updated on None." - How can I edit it?

[FabianBloch]

In the footer now stands:

By <author>
© Copyright <copyright>.
Last updated on None.

It comes with v0.14.0 - 2023-02-28 I think.

How you can edit the term Last updated on None. ?

I just know that you can edit <author> and <copyright> in the _config.yml-file.

My environment

Jupyter Book : 0.14.0
External ToC : 0.3.1
MyST-Parser : 0.18.1
MyST-NB : 0.17.1
Sphinx Book Theme : 0.4.0rc1
Jupyter-Cache : 0.5.0
NbClient : 0.5.13

[FabianBloch]

It is just away with the update on v0.15.0 ✅ 😁