Update module yaml to v2.2.8

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
gopkg.in/yaml.v2	require	patch	v2.2.4 -> v2.2.8

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Release Notes

go-yaml/yaml

v2.2.8

Compare Source

v2.2.7

Compare Source

v2.2.6

Compare Source

v2.2.5

Compare Source

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Renovate configuration

📅 Schedule: At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻️ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻️ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you check the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: docker run --rm --name=renovate_go --label=renovate_child -v "/mnt/renovate/gh/golangci/golangci-api":"/mnt/renovate/gh/golangci/golangci-api" -v "/tmp/renovate-cache":"/tmp/renovate-cache" -v "/tmp/renovate-cache/others/go":"/tmp/renovate-cache/others/go" -e GOPATH -e CGO_ENABLED -w "/mnt/renovate/gh/golangci/golangci-api" renovate/go bash -l -c "git config --global url.\"https://x-access-token:**redacted**@github.com/\".insteadOf \"https://github.com/\" && go get -d ./..."
go: downloading github.com/golangci/golangci-lint v1.20.0
go: downloading gopkg.in/yaml.v2 v2.2.8
go: downloading golang.org/x/tools v0.0.0-20190930201159-7c411dea38b0
go: extracting gopkg.in/yaml.v2 v2.2.8
verifying github.com/golangci/[email protected]: checksum mismatch
	downloaded: h1:BRmroXvnikbTCJJ+wbBgbt2kfbDC5RGONSK8xL9D6eo=
	go.sum:     h1:bokjFHRgut7TT9YiKSVWVscWfZNs1fQgSz94geGPHJw=

SECURITY ERROR
This download does NOT match an earlier download recorded in go.sum.
The bits may have been replaced on the origin server, or an attacker may
have intercepted the download attempt.

For more information, see 'go help module-auth'.