Update Node.js versions in CI workflow

Author: jamiehale

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [18.x, 20.x, 22.x, 24.x]
+        node-version: [v24, v25, v26]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps: