Buckle up! Starting deployment for v2.x... Template validation failed

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## Describe the bug

Are you ready to explore the world of v2.x? (y/N): y
Buckle up! Starting deployment for v2.x...
Template validation failed

## To Reproduce

Steps to reproduce the behavior:

git clone https://github.com/aws-samples/bedrock-claude-chat.git
cd bedrock-claude-chat
chmod +x bin.sh
./bin.sh

## Screenshots

If applicable, add screenshots to help explain your problem.

## Additional context

Add any other context about the problem here.

Start by cloning the repository and running chmod +x bin.sh followed by ./bin.sh, as described in the issue. Investigate where the v2.x deployment reports “Template validation failed” and identify which deployment template is being validated. Done means the reported validation failure is resolved and deployment proceeds past that step.

Written by the indexing model from the issue text.