Allow users to update existing GitHub pull request comments using a GitHub Action Node, particularly for implementing dynamic progress comments in PRs.
## Task description Enable the ability to update existing GitHub pull request comments using a GitHub Action Node. ## Background The goal is to allow users to update pull request comments, particularly for implementing progress comments similar to those shown in [giselle pull request #1062](https://github.com/giselles-ai/giselle/pull/1062). This functionality should be available within an Action Node to provide dynamic feedback and status updates directly in GitHub pull requests during a workflow. ## TODO (Optional) - [ ] Add a new operation or modify an existing one in the GitHub Action Node to support updating pull request comments. - [ ] Ensure the node can target a specific comment for an update (e.g., by comment ID). - [ ] Implement necessary input fields for the comment ID and the new comment body. - [ ] Add comprehensive unit and integration tests for the comment update functionality. - [ ] Update the documentation for the GitHub Action Node to include instructions and exam