Update pipeline.yml

Author: gsag

.github/workflows/pipeline.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [$NODE_VERSION]
+        node-version: ["$NODE_VERSION"]
     steps:
     - uses: actions/checkout@v4
     - name: Use Node.js ${{ matrix.node-version }}