fix duplicate entry for completion

lua/lsp/blink.lua

@@ -6,6 +6,7 @@ return { -- blink autocompletion
   ---@type blink.cmp.Config
   opts = {
     completion = {
+      documentation = { auto_show = true },
       list = {
         selection = {
           preselect = false,
@@ -20,9 +21,6 @@ return { -- blink autocompletion
     appearance = {
       nerd_font_variant = 'normal',
     },
-    completion = {
-      documentation = { auto_show = true },
-    },
     sources = {
       -- add lazydev to your completion providers
       default = { 'lazydev', 'lsp', 'path', 'snippets', 'buffer' },