docs(receipts): fix escaped '%' (#120)

Author: linrongbin16

README.md

@@ -101,17 +101,15 @@ require("lsp-progress").setup({
     local has_title = false
     local has_message = false
     if type(title) == "string" and string.len(title) > 0 then
-      local escaped_title = title:gsub("%%", "%%%%")
-      table.insert(builder, escaped_title)
+      table.insert(builder, title)
       has_title = true
     end
     if type(message) == "string" and string.len(message) > 0 then
-      local escaped_message = message:gsub("%%", "%%%%")
-      table.insert(builder, escaped_message)
+      table.insert(builder, message)
       has_message = true
     end
     if percentage and (has_title or has_message) then
-      table.insert(builder, string.format("(%.0f%%%%)", percentage))
+      table.insert(builder, string.format("(%.0f%%)", percentage))
     end
     return { msg = table.concat(builder, " "), done = done }
   end,