Bug#991221: Acknowledgement (buster-pu: package mariadb-10.3 10.3.30-0+deb10u1)

[Otto Kekäläinen]

Control: retitle -1 buster-pu: package mariadb-10.3 10.3.31-0+deb10u1

New MariaDB 10.3.31 is out and it is also a security update. I'll take
this with the sec team since stable updates are not on the horizon
according to release.debian.org.