fix(js): pass children as array in highlight components

[francoischalifour]

Description

This syntax is more conventional when using Fragments and Vue 3 doesn't support spreading children with Fragments.

Related

• Closes Vue example from docs causes 'read-only' error #574

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Sandbox	Source
@algolia/autocomplete-example-github-repositories-custom-plugin	Configuration
@algolia/autocomplete-example-instantsearch	Configuration
@algolia/autocomplete-example-multiple-datasets-with-headers	Configuration
@algolia/autocomplete-example-playground	Configuration
@algolia/autocomplete-example-preview-panel-in-modal	Configuration
@algolia/autocomplete-example-query-suggestion-with-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-hits	Configuration
@algolia/autocomplete-example-query-suggestions-with-inline-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-recent-searches-and-categories	Configuration
@algolia/autocomplete-example-query-suggestions-with-recent-searches	Configuration
charming-sky-w7440	Issue #574