[Snyk] Security upgrade mysql:mysql-connector-java from 8.0.21 to 8.0.27

[snyk-bot]

Snyk has created this PR to fix one or more vulnerable packages in the `maven` dependencies of this project.

Changes included in this PR

• Changes to the following files to upgrade the vulnerable dependencies to a fixed version:
  • pom.xml

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	688/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 5.9	XML External Entity (XXE) Injection SNYK-JAVA-MYSQL-1766958	mysql:mysql-connector-java: 8.0.21 -> 8.0.27	No	Proof of Concept

(*) Note that the real score may have changed since the PR was raised.

Check the changes in this PR to ensure they won't cause issues with your project.

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