fix: use h2/h3 for headings instead of h1/h2 for better seo

[maxkrumpe]

What/Why/How?

Changed headings from h1/h2 to h2/h3 for content items for a better seo behavior.

Because of multiple h1 tags Google will list the pages more bad than with a better structured layout.

Reference

See #2513

Tests

All tests were successfully run (unit tests).
We do not consider issues because only the headings were changed.
Only the look an feel (smaller headings for tags) is a bit different (see screenshot).

Screenshots (optional)

Check yourself

• Code is linted
• Tested
• All new/updated code is covered with tests

[maxkrumpe]

Hey @RomanHotsiy, would you like to spend some time to review this PR?
I am not sure if I forgot something for this PR :)

[AlexVarchuk]

LGTM

[AlexVarchuk]

Please update e2e tests. A couple of them failed in menu.e2e.ts

[maxkrumpe]

Please update e2e tests. A couple of them failed in menu.e2e.ts

Thanks for the notifications.
Now the tests are running again :)

[AlexVarchuk]

@maxkrumpe please merge your PR when you are ready.

[maxkrumpe]

@maxkrumpe please merge your PR when you are ready.

@AlexVarchuk I don't have write access to the repository so unfortunately I cannot merge the PR.

Do you have write access to it to merge the PR?

[AlexVarchuk]

@maxkrumpe Done. Thank you very much for your contribution. 🙌

[maxkrumpe]

@AlexVarchuk thank you too for reviewing the PR.
Do you know when a new version with those changes is planned?