Change inbucket default port from 10080 to 9001 (#18145)

build/dotenv/test.env

@@ -5,7 +5,7 @@ GOBIN=/mattermost/mattermost-server/bin
 
 CI_INBUCKET_HOST=inbucket
 CI_MINIO_HOST=minio
-CI_INBUCKET_PORT=10080
+CI_INBUCKET_PORT=9001
 CI_MINIO_PORT=9000
 CI_INBUCKET_SMTP_PORT=10025
 CI_LDAP_HOST=openldap