build(deps): bump mysql-connector-java from 8.0.16 to 8.0.28 (#514)

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.16 to 8.0.28.
- [Release notes](https://github.com/mysql/mysql-connector-j/releases)
- [Changelog](https://github.com/mysql/mysql-connector-j/blob/release/8.0/CHANGES)
- [Commits](https://github.com/mysql/mysql-connector-j/compare/8.0.16...8.0.28

)

---
updated-dependencies:
- dependency-name: mysql:mysql-connector-java
  dependency-type: direct:production
...
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litemall-db/pom.xml

@@ -57,7 +57,7 @@
                     <dependency>
                         <groupId>mysql</groupId>
                         <artifactId>mysql-connector-java</artifactId>
-                        <version>8.0.16</version>
+                        <version>8.0.28</version>
                     </dependency>
                     <dependency>
                         <groupId>com.itfsw</groupId>

pom.xml

@@ -86,7 +86,7 @@
             <dependency>
                 <groupId>mysql</groupId>
                 <artifactId>mysql-connector-java</artifactId>
-                <version>8.0.16</version>
+                <version>8.0.28</version>
             </dependency>
 
             <dependency>