chore(deps): update mariadb docker digest to 4762bce

Change-Id: Ide813e8ffd6d5bc9c5b803034a7d2f47f64d5aa5
diff --git a/docker-compose.sample.yml b/docker-compose.sample.yml
index af7b637..82c697a 100644
--- a/docker-compose.sample.yml
+++ b/docker-compose.sample.yml
@@ -14,7 +14,7 @@
       - phpsessions:/var/phpsessions
     restart: unless-stopped
   db:
-    image: mariadb@sha256:eb6a2d34367b662a6e9c92e8cd112bbadf03ad4627f8eeb8d19f480f8da87fa6
+    image: mariadb@sha256:4762bcec7c5396fa672d1035498bda3506f29f253190ff4cb642bb7e99785977
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: "yes"
       MARIADB_DATABASE: ${DB_NAME}