fix: add @match for new ChatGPT domain with query parameter
Added @match for https://chatgpt.com/?oai-dm=1 to the Tampermonkey script manifest. This is to
handle the new domain for ChatGPT, as the old domain https://chat.openai.com/ now redirects to
the new address with the '?oai-dm=1' query parameter. The manifest already includes all variations
of the new address except this one.
