Update MariaDB JDBC version to 3.5.7

Author: Refrac

src/main/java/me/refracdevelopment/simpletags/utilities/DownloadUtil.java

@@ -14,7 +14,7 @@ public static void downloadAndEnable(JavaPlugin plugin) {
             Library lib = Library.builder()
                     .groupId("org{}mariadb{}jdbc") // "{}" is replaced with ".", useful to avoid unwanted changes made by maven-shade-plugin
                     .artifactId("mariadb-java-client")
-                    .version("3.5.6")
+                    .version("3.5.7")
                     .build();
             Library lib2 = Library.builder()
                     .groupId("org{}slf4j") // "{}" is replaced with ".", useful to avoid unwanted changes made by maven-shade-plugin