docs: Fix binary literal example

[ftsfranklin]

Caveats:

• I have not built. I edited on the web.
• I manually edited the "documentation snapshot" of the line: 370a222 I don't know what this is, and I don't know whether it was supposed to be autogenerated instead of manually edited.

[max-sixty]

thanks @ftsfranklin ! I'm impressed you managed to get this to work by editing manually!