My YAML file already contains a Resource section and now I want to add a pipeline to the resource section to trigger my publish pipeline after the PR pipeline is successful. THis works fine and the pipeline is trigger when a merge is made to the main branch

Here are the relevant sections as they stand now

trigger: 
  - main

---------- removed parameter and variable sections for brevity -----------

resources:
  repositories: 
    - repository: templates
      type: git
      name: OneBranch.Pipelines/GovernedTemplates
      ref: refs/heads/main

Based on several SO posts like this one: Azure Devops – How to call one pipeline from another

I modified the YAML as such:

trigger: 
  - none

---------- removed parameter and variable sections for brevity -----------

resources:
  repositories: 
    - repository: templates
      type: git
      name: OneBranch.Pipelines/GovernedTemplates
      ref: refs/heads/main
  pipelines:
    - pipeline: DRIContactManagement-Official  
      source: DRIContactManagement-PullRequest 
      trigger: true 

When I run the modified YAML, the pipeline fails with the error: (Line: 14, Col: 1): Did not find expected <document start>. The line number is right below the “trigger”.

Any suggestions to fix this?