Bump mysql-connector-java from 5.0.4 to 8.0.28 in /samples/transaction

Bumps [mysql-connector-java](https://github.com/mysql/mysql-connector-j) from 5.0.4 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/commits/8.0.28)

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

Signed-off-by: dependabot[bot] <support@github.com>
1 file changed
tree: f6797ad99d5d1d807fb426444407d56eac4fa8b3
  1. distribution/
  2. plugin/
  3. rdb/
  4. samples/
  5. tools/
  6. pom.xml