chore: update docs for useBackgroundQuery

[alessbell]

Docs update for useBackgroundQuery, merge after #11018 and #10960 are released in a future beta.

Checklist:

• If this PR contains changes to the library itself (not necessary for e.g. docs updates), please include a changeset (see CONTRIBUTING.md)
• If this PR is a new feature, please reference an issue where a consensus about the design was reached (not necessary for small changes)
• Make sure all of the significant new logic is covered by tests

[changeset-bot]

⚠️ No Changeset found

Latest commit: 2eb39ad

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

size-limit report 📦

Path	Size
dist/apollo-client.min.cjs	33.69 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/main.cjs"	42.45 KB (0%)
import { ApolloClient, InMemoryCache, HttpLink } from "dist/index.js"	33.52 KB (0%)
import { ApolloProvider } from "dist/react/index.js"	914 B (0%)
import { useQuery } from "dist/react/index.js"	25.03 KB (0%)
import { useLazyQuery } from "dist/react/index.js"	25.33 KB (0%)
import { useMutation } from "dist/react/index.js"	23.57 KB (0%)
import { useSubscription } from "dist/react/index.js"	2.41 KB (0%)
import { useFragment_experimental } from "dist/react/index.js"	1.84 KB (0%)

[netlify]

✅ Deploy Preview for apollo-client-docs ready!

Name	Link
🔨 Latest commit	2eb39ad
🔍 Latest deploy log	https://app.netlify.com/sites/apollo-client-docs/deploys/649b9167bfe2100008bcb7c6
😎 Deploy Preview	https://deploy-preview-11021--apollo-client-docs.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.

[jerelmiller]

🎉 📓