chore(deps): bump boto3 in /examples/chatbots/python #975

Job	Run time
python / Check Python library	46s
python / Check Python E2E tests	11s
python / Check Python chatbot	11s
typescript / Check Typescript E2E tests	34s
typescript / Check Typescript chatbot	36s
cdk / Check Python-based Inspiration Server	32s
typescript / Check Typescript library	43s
cdk / Check Typescript-based Cognito stack	22s
cdk / Check Python-based Book Search Server	11s
cdk / Check Typescript-based Weather Alerts Server	1m 33s
cdk / Check Python-based MCP Doc Server	2m 14s
cdk / Check Python-based Time Server	1m 54s
cdk / Check Typescript-based Cat Facts Server	1m 30s
cdk / Check Python-based Dad Jokes Server	10s
cdk / Check Typescript-based Dog Facts Server	1m 35s
cdk / Check Typescript-based Dictionary Server	1m 50s
	14m 52s

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