Update dependency mysql:mysql-connector-java to v8.0.20

Author: renovate-bot

pom.xml

@@ -80,7 +80,7 @@
 		<dependency>
 			<groupId>mysql</groupId>
 			<artifactId>mysql-connector-java</artifactId>
-			<version>8.0.19</version>
+			<version>8.0.20</version>
 		</dependency>
 		<dependency>
 			<groupId>org.liquibase</groupId>