docs: update slots example for the content-query component

[Barbapapazes]

🔗 Linked issue

fix #2173

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Without find="one", the query return an array. So the condition, https://github.com/nuxt/content/blob/main/src/runtime/components/ContentRenderer.vue#L73, can not be true in the ContentRenderer component. I update the example to easily copy-paste code.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
Content	Edit on Studio ↗︎	View Live Preview	c78818a

[netlify]

✅ Deploy Preview for nuxt-content ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	c78818a
🔍 Latest deploy log	https://app.netlify.com/sites/nuxt-content/deploys/64bbbbec3468cb0008ef0ef2
😎 Deploy Preview	https://deploy-preview-2190--nuxt-content.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
content	Edit on Studio ↗︎	View Live Preview	c78818a