fix(cmp): properly set cmp group_index to fix issues with copilot and other sources (#1639)

lua/lazyvim/plugins/coding.lua

@@ -67,12 +67,12 @@ return {
             select = true,
           }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
         }),
-        sources = cmp.config.sources({
-          { name = "nvim_lsp" },
-          { name = "luasnip" },
-          { name = "buffer" },
-          { name = "path" },
-        }),
+        sources = {
+          { name = "nvim_lsp", group_index = 1 },
+          { name = "luasnip", group_index = 1 },
+          { name = "buffer", group_index = 2 },
+          { name = "path", group_index = 2 },
+        },
         formatting = {
           format = function(_, item)
             local icons = require("lazyvim.config").icons.kinds