Cost Optimization -> Compute -> Karpenter Consolidation & spot section : karpenter provisioner spec should be updated as nodepool

[ChanceLee0111]

Describe the problem
In the Karpenter Consolidation & spot section (under Cost Optimization for Compute), there are provisioner spec samples which should be updated as nodepool spec samples

References
https://aws.github.io/aws-eks-best-practices/cost_optimization/cost_opt_compute/#spot
https://aws.github.io/aws-eks-best-practices/cost_optimization/cost_opt_compute/#karpenter-consolidation