chore(lint): use correct browser config base

[erisu]

Platforms affected

n/a

Motivation and Context

Use correct base config for browser.

Description

There was a small change in #956 that didn't match the original base configs.

Originally the base config was @cordova/eslint-config/browser but accidentally changed to @cordova/eslint-config/browser-tests.

This PR changes it back to @cordova/eslint-config/browser.

Testing

npm run lint

Checklist

• I've run the tests to see all new and existing tests pass
• I added automated test coverage as appropriate for this change
• Commit is prefixed with (platform) if this change only applies to one platform (e.g. (android))
• If this Pull Request resolves an issue, I linked to the issue in the text above (and used the correct keyword to close issues using keywords)
• I've updated the documentation if necessary