switch to single quotes

Author: Hweinstock

.github/workflows/node.js.yml

@@ -33,7 +33,7 @@ jobs:
               with:
                   node-version: '20'
             - name: Validate Branch name
-              if: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.ref != ""}}
+              if: ${{ github.event_name == 'pull_request' && github.event.pull_request.head.ref != ''}}
               env:
                   BRANCH_NAME: ${{ github.event.pull_request.head.ref }}
               run: |