Update title and subtitle of donate-neo for YEC 2024

The header of the donate.torproject.org page needs to be updated for the YEC.

"Help keep Tor strong" --> CHANGE TO --> Your donation will be matched!

"Your contribution will help millions of people stay safe and private online every day." --> CHANGE TO --> " Now through December 31, all gifts will be matched 1:1, up to $300,000.

This should be deployed with #132 (closed) and #144 (closed) at 15:00 UTC October 14 2024