dillon1000/react

[compiler:chore] fix SSA pdf reference link (#29162)

## Summary

This PR fixes the deadlink in the SSA comment. Previously the attached
link is down now.

## How did you test this change?

1. I can confirm the PDF in the new link is the same as the old now.
Reference: https://www.recompiled.dev/blog/ssa/
2. I can confirm the old link is down, and it is [not just
me](https://downforeveryoneorjustme.com/pp.info.uni-karlsruhe.de?proto=https)

<img width="580" alt="image"
src="https://github.com/facebook/react/assets/2883231/eeca5eda-6f61-4ac4-a113-1b04370533d9">

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Co-authored-by: Jan Kassens <[email protected]>