fix: insert mode nav shortcut

lua/core/default_config.lua

@@ -184,8 +184,8 @@ M.mappings = {
       backward = "<C-h>",
       end_of_line = "<C-e>",
       forward = "<C-l>",
-      next_line = "<C-k>",
-      prev_line = "<C-j>",
+      next_line = "<C-j>",
+      prev_line = "<C-k>",
       beginning_of_line = "<C-a>",
    },
 

lua/core/mappings.lua

@@ -62,8 +62,8 @@ M.misc = function()
          map("i", inav.backward, "<Left>")
          map("i", inav.end_of_line, "<End>")
          map("i", inav.forward, "<Right>")
-         map("i", inav.next_line, "<Up>")
-         map("i", inav.prev_line, "<Down>")
+         map("i", inav.next_line, "<Down>")
+         map("i", inav.prev_line, "<Up>")
          map("i", inav.beginning_of_line, "<ESC>^i")
       end