Fixed dbt Cloud's breaking change environment variable. #3278

Job	Run time
test (1.3.0, postgres) / test	11m 37s
test (latest_pre, athena) / test	11m 34s
test (latest_pre, bigquery) / test	11m 36s
test (latest_pre, databricks_catalog) / test	1m 1s
test (latest_pre, databricks) / test	1m 9s
test (latest_pre, postgres) / test	11m 36s
test (latest_pre, redshift) / test	11m 34s
test (latest_pre, snowflake) / test	11m 33s
test (latest_pre, trino) / test	11m 36s
Notify Slack	0s
	1h 23m 16s

Provide feedback