Bump mysql-connector-java in /docs/_docs/code-snippets/java

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 8.0.13 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/8.0.13...8.0.28)

---
updated-dependencies:
- dependency-name: mysql:mysql-connector-java
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/docs/_docs/code-snippets/java/pom.xml b/docs/_docs/code-snippets/java/pom.xml
index e041102..ff9268a 100644
--- a/docs/_docs/code-snippets/java/pom.xml
+++ b/docs/_docs/code-snippets/java/pom.xml
@@ -87,7 +87,7 @@
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
-            <version>8.0.13</version>
+            <version>8.0.28</version>
         </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>