Description of changes

With the release of npm 11.0.0, canary builds started failing with

npm ERR! code EBADENGINE
npm ERR! engine Unsupported engine
npm ERR! engine Not compatible with your version of node/npm: npm@11.0.0
npm ERR! notsup Not compatible with your version of node/npm: npm@11.0.0
npm ERR! notsup Required: {"node":"^20.17.0 || >=22.9.0"}
npm ERR! notsup Actual:   {"npm":"[10](https://github.com/aws-amplify/amplify-js/actions/runs/12356454590/job/34494840473#step:16:11).5.0","node":"v18.20.2"}

We don't need to install the latest version of npm, as we're setting up required node/npm versions earlier in the action. Removing npm install -g npm@latest fixes the issue.

Issue #, if available

Description of how you validated changes

• Run build script locally
• Run tests locally

Checklist

• PR description included
• yarn test passes
• Unit Tests are changed or added
• Relevant documentation is changed or added (and PR referenced)

Checklist for repo maintainers

• Verify E2E tests for existing workflows are working as expected or add E2E tests for newly added workflows
• New source file paths included in this PR have been added to CODEOWNERS, if appropriate

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.