[Schema Inaccuracy] Invalid example for `/repos/{owner}/{repo}/security-advisories/{ghsa_id}` requestBody

# Schema Inaccuracy

The JSON Ref is

```
#/paths/~1repos~1{owner}~1{repo}~1security-advisories~1{ghsa_id}/patch/requestBody/content/application~1json/examples/update_vvrs/value
```

It contains an array where the param accepts a single element.

## Reproduction Steps

I found this in 
- ghec
- fpt