[Snyk] Security upgrade org.freemarker:freemarker from 2.3.28 to 2.3.30

[mkowalzik]

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
	768/1000 Why? Proof of Concept exploit, Recently disclosed, Has a fix available, CVSS 7.5	Server-side Template Injection (SSTI) SNYK-JAVA-ORGFREEMARKER-1076795	org.freemarker:freemarker: 2.3.28 -> 2.3.30	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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