fix(deps): update dependency @sanity/tsdown-config to ^0.31.2 (#2285)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
|
[@sanity/tsdown-config](https://redirect.github.com/sanity-io/pkg-utils/tree/main/packages/@sanity/tsdown-config#readme)
([source](https://redirect.github.com/sanity-io/pkg-utils/tree/HEAD/packages/@sanity/tsdown-config))
| [`^0.31.1` →
`^0.31.2`](https://renovatebot.com/diffs/npm/@sanity%2ftsdown-config/0.31.1/0.31.2)
|
![age](https://developer.mend.io/api/mc/badges/age/npm/@sanity%2ftsdown-config/0.31.2?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/npm/@sanity%2ftsdown-config/0.31.1/0.31.2?slim=true)
|

---

### Release Notes

<details>
<summary>sanity-io/pkg-utils (@&#8203;sanity/tsdown-config)</summary>

###
[`v0.31.2`](https://redirect.github.com/sanity-io/pkg-utils/blob/HEAD/packages/@sanity/tsdown-config/CHANGELOG.md#0312)

[Compare
Source](https://redirect.github.com/sanity-io/pkg-utils/compare/@sanity/tsdown-config@0.31.1...@sanity/tsdown-config@0.31.2)

##### Patch Changes

-
[#&#8203;3658](https://redirect.github.com/sanity-io/pkg-utils/pull/3658)
[`b4849ab`](https://redirect.github.com/sanity-io/pkg-utils/commit/b4849abd756bf4b55959630e182fd6f63c6a6d3b)
Thanks
[@&#8203;squiggler-app](https://redirect.github.com/apps/squiggler-app)!
- fix(deps): update dependency browserslist to ^4.29.4

</details>

---

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Catalog-only semver patch for shared tsdown build config; no
application runtime or auth/data paths change in this diff.
> 
> **Overview**
> Bumps the shared pnpm **catalog** entry for `@sanity/tsdown-config`
from `^0.31.1` to `^0.31.2`, so workspace packages that build with that
config (via `catalog:`) pick up the patch release.
> 
> Upstream **0.31.2** is a patch that refreshes its **browserslist**
dependency (`^4.29.4`); there are no API changes called out in the
release notes—only tooling/build-target metadata used by tsdown builds.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
5ecbf68. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Co-authored-by: squiggler-app[bot] <265501495+squiggler-app[bot]@users.noreply.github.com>

Author: squiggler-app[bot]