add help-wanted to kubevirt-restricted-labels

[dhiller]

project-infra/github/ci/prow-deploy/kustom/base/configs/current/plugins/plugins.yaml

Line 743 in 5fea849

label: good-first-issue

it would be great if we could attach the above label to distinguish from good-first-issue as suggested in the docs: https://github.com/kubevirt/community/blob/b4a9c7db5a381b99985ec0f026165b959caf1875/contributors/help-wanted.md?plain=1#L14

[dhiller]

/triage accepted

[dhiller]

/assign