fix(helm): set chart appVersion to 4.0.2

[alecodev]

SUMMARY

Fixed Helm version to match latest release

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[github-actions]

Congrats on making your first PR and thank you for contributing to Superset! 🎉 ❤️

We hope to see you in our Slack community too! Not signed up? Use our Slack App to self-register.

[rusackas]

Ruh roh... thanks for the approval @dpgaspar but it seems we didn't merge this fast enough! @alecodev could you rebase/update the PR, and we'll try to snipe the merge button a little faster this time?

[villebro]

LGTM after rebasing and setting the correct new chart version number (patch bump). FYI we're planning on moving to latest tag after 4.1.0 release for latest stable version, so these types of bump chores won't be needed in the future.