Update AWS SDK version to support EKS Pod Identities

[tvandinther]

Is your feature request related to a problem? Please describe.
I would like to use the EKS pod identity mechanism to provide credentials to the argo events controllers. Alternative credential mechanisms are not the preferred option for the project.

Describe the solution you'd like
Updating the AWS Go SDK version to > v1.47.11 as documented here. I understand that the newer SDK adds to the credential chain used by the SDK to find credentials to support this mechanism.

Describe alternatives you've considered
Using IRSA. This option requires adjusting trust policies on IAM roles and not preferred for the project.

Additional context
It would seem like a simple fix to bump the minor version of the AWS SDK to a supported version in the next release to allow this new form of authentication.

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