fix: add graphql url to env

Author: bhavabhuthi

.github/workflows/pre-merge.yml

@@ -24,6 +24,9 @@ jobs:
       matrix:
         node-version: [20.x]
 
+    env:
+      BACKEND_GRAPHQL_URL: ${{secrets.BACKEND_GRAPHQL_URL}}
+
     steps:
       - uses: actions/checkout@v4
       - name: Use Node.js ${{ matrix.node-version }}