Missing GH status when running virtual job on PR

[VonnyJap]

What happened:

Opened a PR to run a job as virtual.
https://github.com/VonnyJap/screwdriver-config/pull/2/files

Job showed success.

But GH status is pending.

What you expected to happen:
GH status should be updated with success build on PR job.

How to reproduce it:

Use config below to test out.

shared:
  image: node:14
  steps:
    - init: echo 'init'

jobs:
  triggering-ci:
    requires: [ ~pr, ~commit ]
    annotations:
      screwdriver.cd/virtualJob: true
  ci-setup-virtual:
    requires: [ ~triggering-ci ]
    annotations:
      screwdriver.cd/virtualJob: true
  ci-deploy:
    requires: [ ~ci-setup-virtual ]