Update dependency mysql:mysql-connector-java to v8

Author: mend-for-gitproxy.zycloud.tk[bot]

pom.xml

@@ -17,7 +17,7 @@
     <dependency>
     	<groupId>mysql</groupId>
     	<artifactId>mysql-connector-java</artifactId>
-    	<version>5.1.26</version>
+    	<version>8.0.33</version>
     </dependency>
     <dependency>
 	    <groupId>org.json</groupId>