Update browserlist

[yubiuser]

What does this PR aim to accomplish?:

Updates browserslist. Currently, the node report a warning

Browserslist: caniuse-lite is outdated. Please run:
npx browserslist@latest --update-db
Why you should do it regularly: https://github.com/browserslist/browserslist#browsers-data-updating

E.g. here: https://github.com/pi-hole/AdminLTE/runs/8282732201?check_suite_focus=true

This PR simply executed the suggest npx browserslist@latest --update-db and created a commit from the diff.

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[yubiuser]

Test now don't throw a warning anymore: https://github.com/pi-hole/AdminLTE/runs/8294574728?check_suite_focus=true

[pralor-bot]

This pull request has been mentioned on Pi-hole Userspace. There might be relevant details there:

https://discourse.pi-hole.net/t/pi-hole-ftl-v5-18-web-v5-15-and-core-v5-12-1-released/57894/1