Update EKS version to 1.34 and kubectl to 1.34.4

[jrgwv]

Summary

Update EKS Kubernetes version references to 1.34 to match the companion python-fastapi-demo-docker repo which was updated and tested with EKS 1.34 last week.

Changes

• create-cluster.md: Updated Kubernetes version from 1.32 → 1.34 in both Auto Mode and Managed Node Groups cluster descriptions
• setup-ws-instance-python.sh: Updated kubectl download from 1.30.0 → 1.34.4 (per EKS docs)

Testing

Companion app tested on EKS 1.34 prior to this change.

[dshamanthreddy]

LGTM! Clean version bump. Ship it!

[jrgwv]

Thanks for the review! To confirm both points:

1. Companion repo YAML files — The YAML files in python-fastapi-demo-docker (eks/create-automode-python.yaml, eks/create-mng-python.yaml, and eks/karpenter/create-mng-python.yaml) were already updated to 1.34 in a prior commit last week.
2. Other setup scripts — There's only one setup script in this repo (scripts/setup-ws-instance-python.sh) that downloads kubectl, and it's already bumped to 1.34.4 in this PR. No other scripts download kubectl.