fix paths

Author: mohamed82008

docs/make.jl

@@ -8,13 +8,13 @@ makedocs(
         "Problem definition" => "problem/problem.md",
         "Gradients, Jacobians and Hessians" => [
             "Overview" => "gradients/gradients.md",
-            "user_defined.md",
-            "other_ad.md",
-            "chainrules_fd.md",
-            "sparse.md",
-            "symbolic.md",
-            "implicit.md",
-            "history.md",
+            "gradients/user_defined.md",
+            "gradients/other_ad.md",
+            "gradients/chainrules_fd.md",
+            "gradients/sparse.md",
+            "gradients/symbolic.md",
+            "gradients/implicit.md",
+            "gradients/history.md",
         ],
         "Algorithms" => [
             "Overview" => "algorithms/algorithms.md",