Update src/pyscipopt/lp.pxi

Co-authored-by: João Dionísio <57299939+Joao-Dionisio@users.noreply.github.com>

Author: lidingxu

src/pyscipopt/lp.pxi

@@ -485,7 +485,7 @@ cdef class LP:
     def getActivity(self):
         """
         Returns the row activity vector of the last LP solve.
-        If the vecotr does not exists, None will be returned.
+        If the vector does not exist, None will be returned.
         """
         if not self.isOptimal():
             return None