Update dependency org.mariadb.jdbc:mariadb-java-client to v3

Author: renovate[bot]

build.gradle

@@ -61,7 +61,7 @@ dependencies {
     implementation("com.google.auth:google-auth-library-oauth2-http:1.19.0")
     implementation("org.yaml:snakeyaml:2.1") /// TODO: remove this once transitive dependency passes owasp checker
 
-    runtimeOnly("org.mariadb.jdbc:mariadb-java-client:2.7.9")
+    runtimeOnly("org.mariadb.jdbc:mariadb-java-client:3.1.4")
     providedRuntime("org.springframework.boot:spring-boot-starter-tomcat")
 
     testImplementation("junit:junit:4.13.2")