GRANT RECIPIENTS: Unclear mention of "ISRG"

[Chealer]

The description of PROSSIMO in the Alpha grant recipients ends with:

In 2023 ISRG was granted $530,000 for the purpose of moving the most critical software on the Internet to memory safe code.

It would clarify to define what ISRG is, or perhaps spell it out.

By the way

The [VIEW PROGRESS](https://github.com/ossf/alpha-omega/tree/main/alpha/engagements/2023/Homebrew) link points to the page for Homebrew. Homebrew's link is also broken.