`workflow_run` triggered on `[completed]` receives `run-name` (aka `display_title`) as `name` in `event`

Describe the bug
When workflow is triggered as workflow_run on [completed] it receives run-name as name in the event. workflow_run object.

To Reproduce
Steps to reproduce the behavior:

Create 2 workflows:

1. To trigger

name: Test workflow
run-name: Unexpected value

on:
  workflow_dispatch:

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - run: echo 1

2. To watch for workflow run:

name: WF Run
on:
  workflow_run:
    workflows:
      - Test workflow
    types:
      - requested
      - completed
jobs:
  export:
    runs-on: ubuntu-latest
    steps:
      - run: |
          echo "name          = '${{ github.event.workflow_run.name }}'"
          echo "display_title = '${{ github.event.workflow_run.display_title }}'"

On requested it outputs:

name          = 'Test workflow'
display_title = 'Test workflow'

And on completed:

name          = 'Unexpected value'
display_title = 'Unexpected value'

Expected behavior
Expecting to see name in the workflow_run.name and run-name in github.event.workflow_run.display_title.

Runner Version and Platform

Version of your runner? Latest

OS of the machine running the runner? Ubuntu

What's not working?

Outputs run-name instead of name in the event object.

Start by reproducing the issue with the two workflow YAML examples, comparing the requested and completed workflow_run event outputs on Ubuntu. Trace how the runner application constructs the event object; done means workflow_run.name remains Test workflow and display_title contains Unexpected value for the completed run.