(fix) Using a github app to push helm charts

[shivaccuknox]

Description

Fixes # #202

Does this PR introduce a breaking change?

Checklist

• PR title follows the <type>: <description> convention
• I use conventional commits in my commit messages
• I have updated the documentation accordingly
• I Keep It Small and Simple: The smaller the PR is, the easier it is to review and have it merged
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Additional information for reviewer

SInce this is a github action, we can test only after committing to the main

Mention if this PR is part of any design or a continuation of previous PRs

[shivaccuknox]

This change is based on https://docs.github.com/en/apps/creating-github-apps/authenticating-with-a-github-app/making-authenticated-api-requests-with-a-github-app-in-a-github-actions-workflow