Change dbt host URL to API endpoint

Updated dbt host URL for API access.

Author: trouze

topologies/basic/.env.example

@@ -16,7 +16,7 @@
 
 export TF_VAR_dbt_account_id=YOUR_ACCOUNT_ID          # Numeric ID from dbt Cloud > Account Settings
 export TF_VAR_dbt_token="YOUR_API_TOKEN"               # dbt Cloud service token or personal access token
-export TF_VAR_dbt_host_url="https://cloud.getdbt.com"  # Change for single-tenant deployments
+export TF_VAR_dbt_host_url="https://cloud.getdbt.com/api"  # Change for single-tenant deployments
 
 # Required for GitHub App repository integration (used to auto-discover installation IDs).
 # Can be the same value as dbt_token for most setups.