[Snyk] Security upgrade alpine from latest to 3.18.3

[rimolive]

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

• kustomize-fns/Dockerfile

We recommend upgrading to alpine:3.18.3, as this image has only 0 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	Issue	Exploit Maturity
	Improper Authentication SNYK-ALPINE318-OPENSSL-5776808	No Known Exploit
	Improper Authentication SNYK-ALPINE318-OPENSSL-5776808	No Known Exploit
	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	Inefficient Regular Expression Complexity SNYK-ALPINE318-OPENSSL-5788370	No Known Exploit
	CVE-2023-3817 SNYK-ALPINE318-OPENSSL-5821142	No Known Exploit

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[openshift-ci]

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[openshift-ci]

@rimolive: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/ci-index	07a971a	link	true	/test ci-index
ci/prow/48-ci-index	07a971a	link	true	/test 48-ci-index
ci/prow/48-modh-operator-e2e-48	07a971a	link	false	/test 48-modh-operator-e2e-48
ci/prow/modh-operator-e2e	07a971a	link	false	/test modh-operator-e2e
ci/prow/images	07a971a	link	true	/test images
ci/prow/48-images	07a971a	link	true	/test 48-images

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