Release v0.8.0

Changes included in v0.8.0:

📚 Documentation

• update readme example #100
  • [USER][DOC] updated README example of ManagedMetric

🚀 Features

• Metric multi dimensions #107
  • [OPERATOR][FEATURE] Adding support for multi dimensions on built-in metrics
• Fix cluster name parsing logic #105
  • [USER][FEATURE] Fixes hostname parsing logic