Fix typo in button style

[jahow]

Followup of #775

A typo in the button CSS was causing a visual issue

[github-actions]

Affected libs: ui-inputs, feature-dataviz, feature-record, feature-router, feature-search, feature-map, feature-editor, ui-elements, feature-catalog, ui-catalog, ui-search,
Affected apps: metadata-converter, metadata-editor, datahub, demo, webcomponents, search, map-viewer, datafeeder,

• 🚀 Build and deploy storybook and demo on GitHub Pages
• 📦 Build and push affected docker images

[coveralls]

coverage: 82.251% (-1.8%) from 84.006%
when pulling 0145020 on button-css-typo
into 3fffada on main.