fix: revert luasnip source to use current cursor position

Author: Saghen

lua/blink/cmp/sources/luasnip.lua

@@ -118,7 +118,8 @@ function source:execute(ctx, item)
   if snip.regTrig then snip = snip:get_pattern_expand_helper() end
 
   -- get (0, 0) indexed cursor position
-  local cursor = { ctx.cursor[1] - 1, ctx.cursor[2] }
+  local cursor = vim.api.nvim_win_get_cursor(0)
+  cursor[1] = cursor[1] - 1
 
   local expand_params = snip:matches(require('luasnip.util.util').get_current_line_to_cursor())