fix: issue with patternhub not having a fallback for `not found` pages

[nmerget]

Proposed changes

Fix issue for Marketingportal, resolves https://github.com/db-ui/mono/issues/1546

Types of changes

• [x] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Refactoring (fix on existing components or architectural decisions)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] Documentation Update (if none of the other choices apply)

Further comments

[github-actions[bot]]

🔭🐙🐈 Test this branch here: https://db-ui.github.io/mono/review/fix-patternhub-redirect-404

[mfranzke]

@nmerget shouldn't this lead to that https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/?page=state redirects to https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/overview?page=state (which it doesn't at the moment)?

[mfranzke]

@nmerget https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/?page=state still doesn't work, only https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button?page=state does now.

[nmerget]

https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/?page=state

This is not a vaild URL. And the Marketingportal is not using this, so we are fine here

[mfranzke]

https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/?page=state

https://db-ui.github.io/mono/review/fix-patternhub-redirect-404/components/button/?page=state -> this actually is a valid URL, compare to e.g. https://db-ui.github.io/elements/?path=/story/00-intro-welcome--page, which is resolving to https://db-ui.github.io/elements/index.html?path=/story/00-intro-welcome--page

And https://db-ui.github.io/mono/review/main/components/button?page=tonality is what's among other currently in use within the Marketingportal pages: