ci: build JS packages (#10156)

### Description

Making sure we find out if we broke building JS packages sooner.

### Testing Instructions

CI

---------

Co-authored-by: Chris Olszewski <[email protected]>

Author: anthonyshew

.github/workflows/test-js-packages.yml

@@ -72,7 +72,7 @@ jobs:
         # to run when turbo core changes. This job (`js_packages`) does not run on turborpeo core
         # changes, and we don't want to enable that beahvior for _all_ our JS packages.
         run: |
-          TURBO_API= turbo run check-types test --filter="!turborepo-repository" --filter={./packages/*}...[${{ github.event.pull_request.base.sha || 'HEAD^1' }}] --color --env-mode=strict
+          TURBO_API= turbo run check-types test build --filter="!turborepo-repository" --filter={./packages/*}...[${{ github.event.pull_request.base.sha || 'HEAD^1' }}] --color --env-mode=strict
         env:
           NODE_VERSION: ${{ matrix.node-version }}