[Snyk] Security upgrade ubuntu from latest to kinetic-20220830

[circleci-secops]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• docs/examples/postgresql_service.Dockerfile

We recommend upgrading to ubuntu:kinetic-20220830, as this image has only 9 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

Some of the most important vulnerabilities in your base image include:

Severity	Priority Score / 1000	Issue	Exploit Maturity
	221	NULL Pointer Dereference SNYK-UBUNTU2204-OPENSSL-3043317	No Known Exploit
	325	Buffer Overflow SNYK-UBUNTU2204-OPENSSL-3092568	No Known Exploit
	325	Buffer Overflow SNYK-UBUNTU2204-OPENSSL-3092591	No Known Exploit
	150	Time-of-check Time-of-use (TOCTOU) SNYK-UBUNTU2204-SHADOW-2801886	No Known Exploit
	150	Time-of-check Time-of-use (TOCTOU) SNYK-UBUNTU2204-SHADOW-2801886	No Known Exploit

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