EKSA docs website to display previous releases

[mitalipaygude]

What happened:

• The most recent release is the only release that shows up on the website

What you expected to happen:

• Users should be able to select the drop down and go to the docs for previous releases

How to reproduce it (as minimally and precisely as possible):
https://anywhere.eks.amazonaws.com/

Anything else we need to know?:

[rothgar]

We need to add more verisons to the config.toml file here https://github.com/aws/eks-anywhere/blob/main/docs/config.toml#L172-L176=

See karpenter for an example https://github.com/aws/karpenter/blob/main/website/config.yaml#L70-L76=

[csplinter]

Closing this as we've added previous versions to the docs in the top right Versions toggle