I tried multiple search terms on the usual suspect search engines as well as on stack overflow and superuser, but can't find anything on this. Normally a Zip archive magic pattern is "at least v1.0" or "at least v2.0".
The closest I can come is "COMBINING REVERSED COMMA ABOVE" or "Greek dasia, rough breathing mark" which appears to me as a curly single open quote, but it makes no sense in the context, so I doubt it's right.
No issues with the zip archive, just a curiosity.
If it helps the string was generated by file v5.33 on macOS 10.14 with bash 4.4.5.