chore(deps): bump uvicorn in /examples/chatbots/python #1425

Job	Run time
typescript / Check Typescript E2E tests	45s
python / Check Python E2E tests	13s
python / Check Python chatbot	10s
typescript / Check Typescript chatbot	43s
typescript / Check Typescript library	43s
python / Check Python library	45s
cdk / Check Python-based Book Search Server	2m 32s
cdk / Check Typescript-based Cognito stack	24s
cdk / Check Python-based Time Server	2m 2s
cdk / Check Python-based MCP Doc Server	1m 58s
cdk / Check Python-based Zen Server	35s
cdk / Check Typescript-based Cat Facts Server	1m 39s
cdk / Check Python-based Dad Jokes Server	2m 6s
cdk / Check Typescript-based Dog Facts Server	1m 37s
cdk / Check Typescript-based Weather Alerts Server	1m 45s
cdk / Check Typescript-based Dictionary Server	1m 55s
	19m 52s

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