[ci] update actions to v4

[nan-li]

Description

One Line Summary

Upgrade actions for CI due to deprecation.

Details

Motivation

• CI broke (see action), even though we really don't have much tests in this repo, let's still update.
• See deprecation notice: https://github.blog/changelog/2024-04-16-deprecation-notice-v3-of-the-artifact-actions/
• Let's update all actions packages to v4

Testing

Unit testing

Manual testing

Affected code checklist

• Notifications
  • Display
  • Open
  • Push Processing
  • Confirm Deliveries
• Outcomes
• Sessions
• In-App Messaging
• REST API requests
• Public API changes

Checklist

Overview

• I have filled out all REQUIRED sections above
• PR does one thing
• Any Public API changes are explained in the PR details and conform to existing APIs

Testing

• I have included test coverage for these changes, or explained why they are not needed
• All automated tests pass, or I explained why that is not possible
• I have personally tested this on my device, or explained why that is not possible

Final pass

• Code is as readable as possible.
• I have reviewed this PR myself, ensuring it meets each checklist item

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This change is 

[nan-li]

Forgot to change the base and merged the release PR into here.

[jinliu9508]

LGTM!