I am also tried triggering the Github actions despatch event workflow , (workflow despatch event at origination level), finally i got know is for PAT token need to have permission like "Read and write access to actions and workflows" "Read access to code and metadata (Contents Permission Tab)" ,It works by adding bearer and Tokens, below link will helpfull.

https://docs.github.com/en/rest/actions/workflows?apiVersion=2022-11-28#create-a-workflow-dispatch-event--code-samples