Fix yarn install

.github/workflows/e2e-tests.yml

@@ -59,7 +59,9 @@ jobs:
         node-version-file: '.nvmrc'
     - uses: KittyCAD/action-install-cli@use-powershell-windows
     - name: Install dependencies
-      run: yarn
+      run: |
+        npm install --global yarn
+        yarn
     - name: Cache Playwright Browsers
       uses: actions/cache@v4
       with: