Add helm update with chart version [semver:patch]

[joosangkim]

Checklist

• [x] All new jobs, commands, executors, parameters have descriptions
• [x] Examples have been added for any significant new features
• [x] README has been updated, if necessary

Motivation, issues

upgrade-helm-chart feature always upgrade latest version of the assgined chart. The orb official document says upgrading to specific version can be possible(https://circleci.com/developer/orbs/orb/circleci/helm#commands-upgrade-helm-chart).

Description

Added ${VERSION} value to end of upgrade-helm-chart.yaml. This values will be set to --version YOUR_VERSION if version parameter specified.

[lokst]

@joosangkim Your changes are available in version 1.1.1 of the orb 🎉