Fix wrong heading structure in geometry chapter

[martinfiebig]

Describe your changes

This pull request fixes the wrong heading structure described in #315

Issue ticket number and link

#315

Checklist before requesting a review

• I have performed a self-review of my code/documentation.
• My changes generate no new warnings during the documentation generation.

[ClemensLinnhoff]

I would remove the 7.3 page, as written here: #315 (comment)

[martinfiebig]

Hi @ClemensLinnhoff, I've removed the 7.3 page now.

[ClemensLinnhoff]

Hi @ClemensLinnhoff, I've removed the 7.3 page now.

Thanks, but now this link does not work anymore. I am not sure if there are more links to this page in the documentation, that need to be fixed:
https://github.com/asam-ev/OpenMATERIAL/blob/main/content/geometry/general.adoc?plain=1#L106

[martinfiebig]

Thanks, but now this link does not work anymore. I am not sure if there are more links to this page in the documentation, that need to be fixed: https://github.com/asam-ev/OpenMATERIAL/blob/main/content/geometry/general.adoc?plain=1#L106

Hi Clemens, I just went through the documentation and fixed the link wherever it was broken.