Update browserlist

[sneridagh]

• [ ] I signed and returned the Plone Contributor Agreement, and received and accepted an invitation to join a team in the Plone GitHub organization.
• [ ] I verified there aren't other open pull requests for the same change.
• [ ] I followed the guidelines in Contributing to Volto.
• [ ] I succesfully ran code linting checks on my changes locally.
• [ ] I succesfully ran unit tests on my changes locally.
• [ ] I succesfully ran acceptance tests on my changes locally.
• [ ] If needed, I added new tests for my changes.
• [ ] If needed, I added documentation for my changes, either in the Storybook or narrative documentation.
• [ ] I included a change log entry in my commits.

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[stevepiercy]

https://www.npmjs.com/package/browserlist says use https://github.com/browserslist/browserslist. browserslist. Should we use GitHub directly instead of npmjs.com?

Also https://6.docs.plone.org/volto/contributing/language-features.html#browser-compatibility should be updated, if you change that requirement. There's also another typo.

[davisagli]

@stevepiercy We are in fact using browserslist, not browserlist. It is misspelled in the title of this PR, the towncrier entry, and a couple places in https://6.docs.plone.org/volto/contributing/language-features.html#browser-compatibility

Updating the package doesn't change the rules that we are using it to apply.

[stevepiercy]

Addressed in https://github.com/plone/volto/commit/528ef97cc26998029e6c67c2baa9e7e45eb5238f as part of https://github.com/plone/volto/pull/6397