build: add missing AZURE_STORAGE_ACCOUNT variable

.github/workflows/build.yml

@@ -42,6 +42,7 @@ jobs:
     if: github.ref == 'refs/heads/bullseye'
     env:
       AZURE_STORAGE_SAS_TOKEN: ${{ secrets.AZURE_STORAGE_SAS_TOKEN }}
+      AZURE_STORAGE_ACCOUNT: ${{ secrets.AZURE_STORAGE_ACCOUNT }}
     steps:
       - name: Checkout Repository
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # 4.1.7