Disable Azure task in pipeline

# https://stackoverflow.com/a/63670795/4293785
parameters:
- name: RunTask
  displayName: Run task?
  type: boolean
  default: true

steps:

- pwsh: Write-Host "always run this task"

- pwsh: Write-Host "skip this task when checkbox unticked..."
  condition: eq(${{ parameters.RunTask }}, true)

- pwsh: Write-Host "skip this task when checkbox unticked..."
  enabled: ${{ parameters.RunTask }}

- ${{ if eq(parameters.RunTask, true) }}:
  - pwsh: Write-Host "skip this task when checkbox unticked..."

- ${{ if parameters.RunTask }}:
  - pwsh: Write-Host "skip this task when checkbox unticked..."