Update Node to match server

Author: pimterry

Diff for: .github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
       # Install Node
       - uses: actions/setup-node@v4
         with:
-          node-version: 20.8.0
+          node-version: 20.18.1
           cache: 'npm'
 
       # Install & build & test:
@@ -60,7 +60,7 @@ jobs:
       # Install Node
       - uses: actions/setup-node@v4
         with:
-          node-version: 20.8.0
+          node-version: 20.18.1
           cache: 'npm'
 
       # Install & unit test & build