[Snyk] Security upgrade io.minio:minio from 8.2.1 to 8.4.4

[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:
  • castor-service/pom.xml

Vulnerabilities that will be fixed

With an upgrade:

Severity	Priority Score (*)	Issue	Upgrade	Breaking Change	Exploit Maturity
	731/1000 Why? Proof of Concept exploit, Has a fix available, CVSS 8.2	Information Exposure SNYK-JAVA-COMSQUAREUPOKHTTP3-2958044	io.minio:minio: 8.2.1 -> 8.4.4	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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[strieflin]

Will be fixed by #43.