fix(ci): Update CI for Yarn v4

Author: donmccurdy

.github/workflows/main.yml

@@ -17,5 +17,6 @@ jobs:
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node-version }}
-      - run: yarn install --frozen-lockfile
+      - run: corepack enable
+      - run: yarn install --immutable
       - run: npm test