[Snyk] Security upgrade com.discord4j:discord4j-core from 3.0.15 to 3.0.16

[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
	539/1000 Why? Has a fix available, CVSS 6.5	Denial of Service (DoS) SNYK-JAVA-IONETTY-1020439	com.discord4j:discord4j-core: 3.0.15 -> 3.0.16	No	No Known Exploit

(*) 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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Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

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📚 Read more about Snyk's upgrade and patch logic

[coveralls]

Coverage remained the same at 5.033% when pulling 681859aee2d2a8a0d008eeb7d369bdcde9e1d8a5 on snyk-fix-fc4fbcfbb4bb2d436b05e9262a1d1b19 into 40e2f29cc1bbbdcfcb6c899707008fe8827bd037 on master.