[#56] Add comment on GitHub issue(s) for alpha builds

[pylapp]

Note: Please transform - [ ] into - (NA) in the description when things are not applicable

Related issues

56

Description

Bring feature to leave a comment on issue(s) for alpha builds

Motivation & Context

To notify design, a11y, Q/A teams and stakeholders about new alpha release

Types of change

• New feature (non-breaking change which adds functionality)

Previews

Checklist

Contribution

• [x] I have read the contributing guidelines

Accessibility

• (NA) My change follows accessibility good practices

Design

• (NA) My change respects the design guidelines of Orange Unified Design System

Development

• [x] My change follows the developer guide
• [x] I have added unit tests to cover my changes (optional)

Documentation

• [x] My change introduces changes to the documentation and/or I have updated the documentation accordingly

Checklist (for Core Team only)

• (NA) The evolution have been tested and the project builds for iPhones and iPads
• [x] Code review has been done by reviewers according to CODEOWNERS file
• (NA) Design review has been done
• (NA) Accessibiltiy review has been done
• (NA) Q/A team has tested the evolution
• [x] Documentation has been updated if relevant
• (NA) Internal files have been updated if relevant (like CONTRIBUTING, DEVELOP, THIRD_PARTY, CONTRIBUTORS, NOTICE)
• [x] CHANGELOG has been updated respecting keep a changelog rules and reference the issues