https://blog.canopas.com/automation-trigger-github-workflow-from-the-backend-f04e818094e5 - workflow_final

workflow-final.js

// prepare headers
const config = {
    headers: {
      Accept: "application/vnd.github+json",
      Authorization: "Bearer " +  PERSONAL_ACCESS_TOKEN(PAT)
    }
}; 

 axios.get('https://api.github.com/repos/OWNER/REPO/actions/runs', config)
    .then(res => {
         // res contains list of workflows
         const workflows = res.data["workflow_runs"].filter(function (workflow) {
              return workflow.name == "WorkflowName";
         })
         
        // getting id of first workflow
        const wID = workflows[0].id
    
        axios.post(
              "https://api.github.com/repos/OWENER/REPO/actions/runs/" + wId + "/rerun", 
              null,   // request body will be null
              { headers: config.headers}  //pass headers from config
        );
 })
 .catch(err => {
     console.error(err.message)
 });