fix org_hide_leading_stars on folded lines

Author: Rahul Salvi

lua/orgmode/org/indent.lua

@@ -93,7 +93,8 @@ end
 local function foldtext()
   local line = vim.fn.getline(vim.v.foldstart)
   if config.org_hide_leading_stars then
-    return vim.fn.substitute(line, '\\(^\\*+\\)', '\\=repeat(" ", len(submatch(0))-1) . "*"', '') .. config.org_ellipsis
+    return vim.fn.substitute(line, '\\(^\\*\\+\\)', '\\=repeat(" ", len(submatch(0))-1) . "*"', '')
+      .. config.org_ellipsis
   end
   return line .. config.org_ellipsis
 end