LENS-1337: Update Release documentation for lens 2.6.1
LENS-1337: Update Release documentation for lens 2.6.1

sushilmohanty/incubator-lens,sushrutikhar/grill,sushilmohanty/incubator-lens,sushrutikhar/grill,archanah24/lens,archanah24/lens,sushrutikhar/grill,sushilmohanty/incubator-lens,archanah24/lens,sushrutikhar/grill,archanah24/lens,sushilmohanty/incubator-lens,archanah24/lens,sushilmohanty/incubator-lens,sushrutikhar/grill