Update recommended version. We're currently on 9.1.0

Author: Opt-Mucca

src/pyscipopt/scip.pxi

@@ -38,7 +38,7 @@ include "nodesel.pxi"
 
 # recommended SCIP version; major version is required
 MAJOR = 9
-MINOR = 0
+MINOR = 1
 PATCH = 0
 
 # for external user functions use def; for functions used only inside the interface (starting with _) use cdef