Update custom skill

curl --request PUT \
  --url https://api.case.dev/skills/{slug} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "slug": "<string>",
  "summary": "<string>",
  "content": "<string>",
  "tags": [
    "<string>"
  ],
  "metadata": {}
}
'

{
  "slug": "<string>",
  "name": "<string>",
  "summary": "<string>",
  "content": "<string>",
  "tags": [
    "<string>"
  ],
  "metadata": {},
  "version": 123,
  "updated_at": "2023-11-07T05:31:56Z"
}