update test node to 22

Author: CeeBeeUK

.github/workflows/test.yml

@@ -40,6 +40,10 @@ jobs:
         with:
           bundler-cache: true
 
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
       - name: Find yarn cache location
         id: yarn-cache
         run: echo "dir=$(yarn cache dir)" >> $GITHUB_OUTPUT