[Snyk] Fix for 3 vulnerabilities

[jecos]

Snyk has created this PR to fix 3 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Expression Language Injection SNYK-JAVA-ORGSPRINGFRAMEWORKCLOUD-12591534	751	Major version upgrade No Known Exploit
	Stack-based Buffer Overflow SNYK-JAVA-COMFASTERXMLJACKSONCORE-10500754	649	com.amazonaws:aws-java-sdk-kms: 1.12.779 -> 1.12.791 No Known Exploit
	Denial of Service (DoS) SNYK-JAVA-COMFASTERXMLJACKSONCORE-7569538	649	com.amazonaws:aws-java-sdk-kms: 1.12.779 -> 1.12.791 No Known Exploit

Vulnerabilities that could not be fixed

• Upgrade:
  • Could not upgrade org.springframework.cloud:spring-cloud-starter-gateway@3.1.1 to org.springframework.cloud:spring-cloud-starter-gateway@4.2.5; Reason could not apply upgrade, dependency is managed externally ; Location: provenance does not contain location

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• Check the changes in this PR to ensure they won't cause issues with your project.
• Max score is 1000. Note that the real score may have changed since the PR was raised.
• This PR was automatically created by Snyk using the credentials of a real user.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Denial of Service (DoS)
🦉 Expression Language Injection