Upgrade chart version in documentation

[aeciopires]

What this PR does / why we need it:

Fixed chart version in documentation

A new version and tag of the helm chart will not be generated for now. The change goes to master to facilitate future changes

Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• [x] DCO signed
• [ ] Chart Version bumped
• [ ] Variables are documented in the README.md