Demo 6a nexus endpoint name should be f1-expert-d6 in the readme instructions

[kaparora]

ai-agents-workshop-python/demo6a-different-sdks/README.md

Line 115 in e77cfb5

--name f1-expert \

update :
temporal operator nexus endpoint create
--name f1-expert
--target-namespace default
--target-task-queue f1-expert-agent-tq

to

temporal operator nexus endpoint create
*--name f1-expert-d6 *
--target-namespace default
--target-task-queue f1-expert-agent-tq