How to trigger a GitHub workflow/action of another repository

callee.yml

name: Dispatch receiver

on:
  push:
    branches: [ dev ]
  pull_request:
    branches: [ dev ]

  # Allows you receive the dispatch
  workflow_dispatch:

jobs:
  build:

    runs-on: self-hosted

    steps:
    - name: Clone the repo
      uses: actions/checkout@v2}
      
    # Other steps as per your requirements...

caller.yml

name: Dispatch sender

on:
  push:
    branches: [ dev ]
  pull_request:
    branches: [ dev ]

jobs:
  build:

    runs-on: self-hosted

    steps:
    - name: Clone the repo
      uses: actions/checkout@v2}
      
    # Other steps as per your requirements...

    - name: Deploy Stage
      uses: actions/github-script@v5
      with:
        github-token: ${{ secrets.MY_PAT_FOR_CALLEE_REPO }}
        script: |
          await github.rest.actions.createWorkflowDispatch({
            'owner',
            'repo_name',
            'workflows/callee.yml',
            'branch_name',
          });