Fix warnings from updating

config.nix

@@ -109,12 +109,14 @@
 
     neo-tree = {
       enable = true;
-      closeIfLastWindow = true;
-      filesystem = {
-        filteredItems = {
-          visible = true;
-          hideDotfiles = false;
-          hideGitignored = false;
+      settings = {
+        close_if_last_window = true;
+        filesystem = {
+          filtered_items = {
+            visible = true;
+            hide_dotfiles = false;
+            hide_gItignored = false;
+          };
         };
       };
     };
@@ -162,10 +164,12 @@
     mkdnflow = {
       enable = true;
 
-      mappings = {
-        MkdnEnter = {
-          key = "<CR>";
-          modes = [ "n" "v" "i" ];
+      settings = {
+        mappings = {
+          MkdnEnter = {
+            key = "<CR>";
+            modes = [ "n" "v" "i" ];
+          };
         };
       };
     };