upgrade mariadb-client package from v10.5.11-r0 to v10.5.12-r0

https://git.alpinelinux.org/aports/commit/main/mariadb?id=dfc51b8103f95d354bdab495ce2a44565342b196

Dockerfile

@@ -1,6 +1,6 @@
 FROM docker.io/alpine:3.14.0
 
-ARG MARIADB_CLIENT_PACKAGE_VERSION=10.5.11-r0
+ARG MARIADB_CLIENT_PACKAGE_VERSION=10.5.12-r0
 ARG OPENSSH_SERVER_PACKAGE_VERSION=8.6_p1-r2
 ARG TINI_PACKAGE_VERSION=0.19.0-r0
 ARG USER=dump