That unicode character is named #sym.quote.r.single (see General Symbols – Typst Documentation).
It can be used directly in text like this:
The name #sym.quote.r.single;t Hooft starts with an apostrophe
But that’s annoying to type (note the ; between the symbol name and the t).
A more convenient way is to set up a show rule to apply this automatically:
The name 't Hooft starts with an apostrophe
#show "'t H": [#sym.quote.r.single;t H]
The name 't Hooft starts with an apostrophe
