Update docs to match current linting rules for v-slot syntax

[knolleary]

Story

No response

Description

Lots of the doc examples uses the v-slot:something syntax for identifying slot contents:

<template v-slot:actions>
   <ff-button>Press Me!</ff-button>
   <ff-button>Click Me!</ff-button>
</template>

However those examples now get flagged as linting errors in the main repo as it wants the #something syntax.

<template #actions>
   <ff-button>Press Me!</ff-button>
   <ff-button>Click Me!</ff-button>
</template>