feat(deps): update nethermind dependencies

[renovate-41e06b0f]

This PR contains the following updates:

Package	Update	Change
busybox	minor	1.34.0 -> 1.36.1
lachlanevenson/k8s-kubectl	minor	v1.21.3 -> v1.25.4
nethermind/nethermind	major	v0.0.0 -> 1.20.1

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Configuration

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

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

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This PR has been generated by Renovate Bot.

[renovate-41e06b0f]

⚠ 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 click 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: undefined

Command failed: version=$(grep "^version:" nethermind/Chart.yaml | awk "{print $2}") &&              major=$(echo $version | cut -d. -f1) &&              minor=$(echo $version | cut -d. -f2) &&              patch=$(echo $version | cut -d. -f3) &&              patch=$(expr $patch + 1) &&              echo "Replacing $version with $major.$minor.$patch" &&              sed -i "s/^version:.*/version: ${major}.${minor}.${patch}/g" nethermind/Chart.yaml
grep: nethermind/Chart.yaml: No such file or directory
sed: can't read nethermind/Chart.yaml: No such file or directory