Vue: Fix enum check in extractArgTypes

[ProjektGopher]

This is a followup to PR#18710 as there was a second bug on the same line that wasn't apparent until my extra type check was implemented using nullish coallescing.

If this can be included in v6.5.11 you have no idea how much of a help that would be for me personally on this particular client's work

Issue:
The string check at the end of this line is wrong, allowing null or undefined to pass through to the rest of the method instead of returning false.

What I did

// code/renderers/vue/src/docs/extractArgTypes.ts
- const matched = Array.isArray(values) && values.length && type?.name !== 'enum';
+ const matched = Array.isArray(values) && values.length && type?.name === 'enum';