Updated ContentToc component to scroll spy only the headers (links) passed in the props.
Fixes issue nuxt#5967

benjamincanac changed the title fix(ContentToc): correct highlight feature for custom depth headers fix(ContentToc): use actual links for scrollspy instead of hardcoded h2/h3

benjamincanac changed the title fix(ContentToc): use actual links for scrollspy instead of hardcoded h2/h3 fix(ContentToc): use links for scrollspy instead of hardcoded h2/h3