Fix publish template url for GHA action (#46040)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/46040

The URL to dispatch the workflow was not correct, see [0].

## Changelog: [Internal]

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

## Internal:

For S441191, see the job launched:
- https://github.com/react-native-community/template/actions/runs/10404141179/job/28811993693

 {F1806960111}

Reviewed By: cipolleschi

Differential Revision: D61333084

fbshipit-source-id: 62b20d792b9c667b3ee80d6d446423a6d24a67c2