[Snyk] Security upgrade golang from 1.9 to 1.17.8

[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

• vendor/golang.org/x/net/http2/h2demo/Dockerfile.0

We recommend upgrading to golang:1.17.8, as this image has only 96 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
	733	Loop with Unreachable Exit Condition ('Infinite Loop') SNYK-DEBIAN9-OPENSSL-2426305	No Known Exploit
	714	Out-of-bounds Read SNYK-DEBIAN9-PERL-327610	No Known Exploit
	714	Out-of-bounds Write SNYK-DEBIAN9-PERL-327621	No Known Exploit
	714	Out-of-Bounds SNYK-DEBIAN9-PERL-327638	No Known Exploit
	714	Out-of-bounds Write SNYK-DEBIAN9-WGET-342192	No Known Exploit

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