docs: fix jest.config.js

[leobenzol]

When following the docs to setup testing, you get the following error:

Failed to deserialize buffer as swc::config::Options
    JSON: {"jsc":{"parser":{"syntax":"typescript","decorators":true},"target":"es2023","transform":{"hidden":{"jest":true}}},"sourceMaps":"inline","module":{"type":"commonjs"},"filename":"integration-tests/setup.js"}

    Caused by:
        unknown variant `es2023`, expected one of `es3`, `es5`, `es2015`, `es2016`, `es2017`, `es2018`, `es2019`, `es2020`, `es2021`, `es2022`, `esnext` at line 1 column 246

It only happens when @swc/jest is manually installed, explicitly setting the target fixes it. In the starter it works since @swc/jest is not installed directly.

Steps to repro:

• npx create-medusa-app
• yarn test:integration:http (works)
• yarn add --dev @swc/jest
• yarn test:integration:http (error)

[changeset-bot]

⚠️ No Changeset found

Latest commit: ddf42c6

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

[vercel]

@steelrazor47 is attempting to deploy a commit to the medusajs Team on Vercel.

A member of the Team first needs to authorize it.

[shahednasser]

Thanks!