Auto-selects Gemini Pro in chats (if available)
I got tired of realizing I hadn't selected "Pro" in my chats before hitting submit. Sharing in case someone else finds it helpful. Works with Gemini at gemini.google.com/* only.
NOTE: Not to be confused with Gemini Enterprise Auto Pro which targets the Gemini Enterprise product at business.gemini.com/*. If that's what you need, please use that one instead.
