fix(cmp): correct dead path source name

The only path provider installed is cmp-async-path, which registers as
`async_path`. Our sources list overrode NvChad's index-by-index, so slot
5 became `path` — a name no source claims — and path completion silently
did nothing.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

lua/configs/cmp.lua

@@ -8,7 +8,7 @@ local options = {
     { name = "luasnip" },
     { name = "buffer" },
     { name = "nvim_lua" },
-    { name = "path" },
+    { name = "async_path" },
   },
 
   formatting = {