chore: follow-up to Yarn update (#4478)

* fix(site): `require.resolve` webpack loader

* chore: add pnp sdk

* ci: cache dependencies

* ci: add release `version` command

.github/workflows/release.yml

@@ -26,6 +26,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: 12.x
+          cache: yarn
           registry-url: https://registry.npmjs.org
 
       - name: Install dependencies
@@ -39,6 +40,7 @@ jobs:
         if: matrix.channel == 'latest'
         uses: changesets/action@master
         with:
+          version: yarn changeset version
           publish: yarn changeset publish
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}