upgrade alpine base image to v3.14.2 including mariadb package upgrade to v10.5.13-r0 (see below)

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-35604
https://web.archive.org/web/20211109154547/https://mariadb.com/kb/en/mariadb-10513-release-notes/
https://git.alpinelinux.org/aports/commit/?h=3.14-stable&id=7f922147cfbbaaeb7a71bba1c0f8c6a4b4bb0d47

Dockerfile

@@ -1,6 +1,6 @@
-FROM docker.io/alpine:3.14.2
+FROM docker.io/alpine:3.14.3
 
-ARG MARIADB_CLIENT_PACKAGE_VERSION=10.5.12-r0
+ARG MARIADB_CLIENT_PACKAGE_VERSION=10.5.13-r0
 ARG OPENSSH_SERVER_PACKAGE_VERSION=8.6_p1-r3
 ARG TINI_PACKAGE_VERSION=0.19.0-r0
 ARG USER=dump