[Numerics] Fix version check for SUNDIALS

CVodeGetNumStepSolveFails is only defined in SUNDIALS 6.2 and up. Since the previous version check had a typo, this code was never included.

Closes #1771

src/numerics/CVodesIntegrator.cpp

@@ -611,7 +611,7 @@ AnyMap CVodesIntegrator::solverStats() const
                   "supported with sundials versions less than 4.");
     #endif
 
-    #if SUNDIALS_VERSION_MAJOR >= 6
+    #if SUNDIALS_VERSION_MAJOR >= 7 || (SUNDIALS_VERSION_MAJOR == 6 && SUNDIALS_VERSION_MINOR >= 2)
         long int stepSolveFails = 0;
         CVodeGetNumStepSolveFails(m_cvode_mem, &stepSolveFails);
         stats["step_solve_fails"] = stepSolveFails;