feat(blink): use vim.o.pumblend as winblend option for autocomplete menu in blink

lua/lazyvim/plugins/extras/coding/blink.lua

@@ -36,6 +36,7 @@ return {
       windows = {
         autocomplete = {
           draw = "reversed",
+          winblend = vim.o.pumblend,
         },
         documentation = {
           auto_show = true,