Update dependency mysql:mysql-connector-java to v8.0.26

Author: renovate-bot

pom.xml

@@ -88,7 +88,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.21</version>
+            <version>8.0.26</version>
         </dependency>
 
         <dependency>