[Snyk] Security upgrade golang from 1.9.3 to 1.18.9

[snyk-bot]

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

• images/kubekins-test/Dockerfile-1.10

We recommend upgrading to golang:1.18.9, as this image has only 104 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
	886	Arbitrary Argument Injection SNYK-DEBIAN9-GIT-340821	Mature
	786	Directory Traversal SNYK-DEBIAN9-GIT-340908	Mature
	714	OS Command Injection SNYK-DEBIAN9-OPENSSL-2807589	No Known Exploit
	786	Out-of-bounds Write SNYK-DEBIAN9-PROCPS-309314	Mature
	714	Out-of-bounds Write SNYK-DEBIAN9-WGET-342192	No Known Exploit

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