Fixed issue in environment variable

src/dags/providers/azure/azure_credentials.py

@@ -39,7 +39,7 @@ class AzureCredentials(BaseCredentials):
         self._resource_id = None
 
     def _populate_ad_credentials(self) -> None:
-        uri = os.getenv("KEYVAULT_URI")
+        uri = os.getenv("AIRFLOW_VAR_KEYVAULT_URI")
         credential = DefaultAzureCredential()
         client = SecretClient(vault_url=uri, credential=credential)
         self._client_id = client.get_secret("app-dev-sp-username").value