chore: add styling to thumbnail facet

[davidnuescheler]

https://rum-thumbnail-facet--helix-website--adobe.aem.page/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=month&checkpoint=viewmedia&domainkey=open&conversion.checkpoint=click

vs.

https://main--helix-website--adobe.aem.page/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=month&checkpoint=viewmedia&domainkey=open&conversion.checkpoint=click

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed. In case there are problems, just click a checkbox below to rerun the respective action.

• [ ] Re-run PSI checks
• [ ] Re-sync branch

Commits

* [5009fc1](https://github.com/adobe/helix-website/commit/5009fc1f58d4428f2344d6e58ae46d83559fdc37) :white_check_mark: (latest) * [e1e7dce](https://github.com/adobe/helix-website/commit/e1e7dcedd66a3131b654ec3f91fb6dd416d6a70a) :white_check_mark:

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/tools/rum/explorer.html?domain=emigrationbrewing.com&filter=&view=month&checkpo int=viewmedia&domainkey=open&conversion.checkpoint=click