Update the images on the open community meetups page

We got some nice new images and would like to use them on the open community meetups page. We've added two new images to the "Why you should get involved" section. https://www.figma.com/design/vQWleVU0ZpJ4Nc86tFapCn/Eclipse-Foundation-Website?node-id=1679-424&t=LZNzBVfTqh5qDupP-1