Update psql connection string in quickstart
The quickstart should use the libpq envar `PGDATABASE` instead of
`PGDBNAME` from pgjdbc.
libpq-env:
@@ -116,7 +116,7 @@ PG_CLUSTER_USER_SECRET_NAME=hippo-pguser-hippo
PGPASSWORD=$(kubectl get secrets -n postgres-operator "${PG_CLUSTER_USER_SECRET_NAME}" -o go-template='{{.data.password | base64decode}}') \
PGUSER=$(kubectl get secrets -n postgres-operator "${PG_CLUSTER_USER_SECRET_NAME}" -o go-template='{{.data.user | base64decode}}') \
-PGDBNAME=$(kubectl get secrets -n postgres-operator "${PG_CLUSTER_USER_SECRET_NAME}" -o go-template='{{.data.dbname | base64decode}}') \
+PGDATABASE=$(kubectl get secrets -n postgres-operator "${PG_CLUSTER_USER_SECRET_NAME}" -o go-template='{{.data.dbname | base64decode}}') \
psql -h localhost
```
