How to manually trigger a GitHub Action through the GitHub API

trigger.sh

#!/usr/bin/env bash

# Get the <token> through the GitHub website:
# 1. Go to Settings->Developer Settings->Personal access tokens
# 2. Create a token with the 'repo' scope selected.
# https://docs.github.com/en/github/authenticating-to-github/creating-a-personal-access-token

# The value for "event_type" should match "on.repository_dispatch.type" in workflow.yaml.
curl -X POST \
  -H "Accept: application/vnd.github.v3+json" \
  -H "Authorization: token <token>" \
  -d '{"event_type": "my-special-event-type"}' \
  https://api.github.com/repos/$OWNER/$REPO/dispatches

workflow.yaml

name: My Workflow

on:
  repository_dispatch:
    type: my-special-event-type
    
jobs:
  ...