remove an example containing non existing flag -e for up command

[tarangsutariya]

Description

Removed a misleading example that contained , -e flag for up command that does not exist ( https://github.com/docker/compose/blob/main/docs/reference/compose_up.md ) ,
I don't know if that example was actually meant for run command that has that flag , but, precedence for that is already explained here, https://docs.docker.com/compose/environment-variables/envvars-precedence/ let me know if you would like me to change this example to use run command instead of deleting it ,

I understand this is a very small change but , it might cause misunderstanding like it did to me , so I decided to make the change so no one else has to suffer ,

also , changes to hugo_stats.json were created by docker buildx bake update-stats command because I was getting error when running docker buildx bake validate
Thanks

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