broken navigation in documentation for icons

[pschaub]

The navigation for icons in the documentation is broken.

Reproduction

1. Open https://db-ui.github.io/core/?p=viewall-base-icons
2. See broken navigation on the left side.

[mfranzke]

@pschaub that's sadly a known bug out of the tool we're using – I've opened a ticket and PR to get this solved:
pattern-lab/patternlab-node#1491