v1.6.0

KF 1.6 release 🎉

What's new ✨

• Expose notebook idleness in Notebook management web app #6544 @kimwnasptd
• Notebook Controller QPS and Burst #6453 @mofanke
• Don't show Notebook groups if they don't have any images #6482 @haoxins
• Upgrade Kubebuilder for Profiles Controller #6491 @apo-ger

What's fixed 🐛

• Reload certificates in PodDefaults webhook #6581 @manolis-andr
• Notebooks controller and K8s 1.22 #6374 @samuelvl
• PodDefaults and K8s 1.22 #6459 @aaron-arellano
• TensorBoard and K8s 1.22 #6406 @alembiewski
• Allow Notebook Controller to patch events #6523 @henrysecond1

Upgrade notes ⏫

• The project is using DockerHub hosted images instead of ECR ones #6548. Users will need to update their ovelays accordingly