Updates to sponsorship page copy
*updating this issue since we've changed this section*
We'd like to remove the two "individual" and "corporate" boxes under sponsorship opportunities. We are also updating the heading and the body copy in that section. Note that the body copy is now left-aligned.
figma: https://www.figma.com/proto/vQWleVU0ZpJ4Nc86tFapCn/Eclipse-Foundation-Website?node-id=2453-819&t=4i8cOFy7gk1HEIPa-1&scaling=min-zoom&content-scaling=fixed&page-id=60%3A973
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