correct error message typo
I found this because I got:
```
edgedb.InternalServerError: 'int' object has no attribute 'minimum_version'
```
@@ -859,7 +859,7 @@ cdef class EdgeConnection:
if self.protocol_version < minimum_version:
raise errors.BinaryProtocolError(
f'{feature} is supported since protocol '
- f'{minimum_version[0].minimum_version[1]}, current is '
+ f'{minimum_version[0]}.{minimum_version[1]}, current is '
f'{self.protocol_version[0]}.{self.protocol_version[1]}'
)
