chore(ci): update labeler workflow for labeler@v5 (#28627)

Issue number: N/A

---------

<!-- Please do not submit updates to dependencies unless it fixes an
issue. -->

<!-- Please try to limit your pull request to one type (bugfix, feature,
etc). Submit multiple pull requests if needed. -->

## What is the current behavior?
<!-- Please describe the current behavior that you are modifying. -->

The labeler action is currently failing:
https://github.com/ionic-team/ionic-framework/actions/runs/7090913880/job/19298918578?pr=28622.
This is happening due to a breaking change in v5 of the action.

We currently pull from `main` for this action so we are now receiving v5
of the action:
https://github.com/ionic-team/ionic-framework/blob/fe3c3d500a2afd716ebde81a75b357b7c79d4920/.github/workflows/label.yml#L16

## What is the new behavior?
<!-- Please describe the behavior or changes that are being added by
this PR. -->

- This PR updates the action explicitly to v5 so we don't unexpectedly
take on breaking changes
- This PR also updates the labeler yaml file to account for the v5
breaking changes

## Does this introduce a breaking change?

- [ ] Yes
- [x] No

<!-- If this introduces a breaking change, please describe the impact
and migration path for existing applications below. -->


## Other information

<!-- Any other information that is important to this PR such as
screenshots of how the component looks before and after the change. -->