docs(svelte): replace deprecated isLoading with isPending in overview

[poetryofcode]

isLoading is a deprecated alias for isPending && isFetching and is scheduled for removal in the next major version. The overview example shows a standard (always-enabled) query, so isPending is the correct flag. All other framework overview docs (React, Vue, Angular, Lit, Preact) already use isPending.

Note: isLoading is intentionally retained in disabling-queries guides where it is the right flag for disabled/lazy queries.

🎯 Changes

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

Summary by CodeRabbit

• Documentation
  • Updated the Svelte overview example to use the latest loading-state check in its conditional rendering snippet.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 369efc00-1887-466c-9dbd-0b6143a3cf95

📥 Commits

Reviewing files that changed from the base of the PR and between e6ad3fc and 29b14b8.

📒 Files selected for processing (1)

• docs/framework/svelte/overview.md

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📝 Walkthrough

Walkthrough

The Svelte overview example changes the loading-state condition in the code sample from query.isLoading to query.isPending.

Changes

Svelte overview example

Layer / File(s)	Summary
Loading branch condition docs/framework/svelte/overview.md	The example’s “Loading...” branch now checks query.isPending instead of query.isLoading.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

A bunny hopped by with a page in sight,
“Pending!” it squeaked in the morning light.
No loading lag, just a tidy tune,
A tiny doc tweak beneath the moon.
Hoppity hop, the example feels right 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the PR’s main change: replacing deprecated isLoading with isPending in the Svelte overview docs.
Description check	✅ Passed	The description explains the motivation and scope well, though the checklist and release-impact template items are left unfilled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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