Update mariadb

Changes:

- https://github.com/docker-library/mariadb/commit/813f36f: Update to 1:10.5.2+maria~bionic

library/mariadb

@@ -4,9 +4,9 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/mariadb.git
 
-Tags: 10.5.1-bionic, 10.5-bionic, beta-bionic, 10.5.1, 10.5, beta
+Tags: 10.5.2-bionic, 10.5-bionic, beta-bionic, 10.5.2, 10.5, beta
 Architectures: amd64, arm64v8, ppc64le
-GitCommit: 17fbf28e55c357c52d5025c50d65f2ab2ab508e2
+GitCommit: 813f36fc4cd45f604cca99c11e47c826617502ce
 Directory: 10.5
 
 Tags: 10.4.12-bionic, 10.4-bionic, 10-bionic, bionic, 10.4.12, 10.4, 10, latest