x/website: MISSING HIGHLIGHT @ https://go.dev/doc/tutorial/greetings-multiple-people

[junczhu]

What is the URL of the page with the issue?

https://go.dev/doc/tutorial/greetings-multiple-people

What is your user agent?

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.36 Edg/101.0.1210.39

Screenshot

What did you do?

What did you expect to see?

I am going for the missing highlight in the code example.
We have applied change to those marked lines, but no highlight has been marked yet

Highly recommend to update the doc since tons of new users may get mis-lead and get an unexpected output with the current sample code

What did you see instead?

[seankhliao]

Duplicate of #46416