Fix yarn

Author: timfish

.github/workflows/ci.yml

@@ -227,6 +227,9 @@ jobs:
         if: contains(matrix.os, 'windows')
         run: yarn config set network-timeout 600000 -g
 
+      - name: Install Yarn (if not yet installed)
+        run: yarn --version || npm install -g yarn@1.22.22
+
       - name: Install dependencies
         run: yarn install --ignore-engines --ignore-scripts --frozen-lockfile