Fix Cross-in-tray test function Hessian test

Author: stefan-k

crates/argmin-testfunctions/src/crossintray.rs

@@ -276,7 +276,7 @@ mod tests {
                             hessian[i][j],
                             hessian_fd[i][j],
                             epsilon = f64::EPSILON,
-                            max_relative = 1e-4
+                            max_relative = 1e-3
                         );
                     }
                 }