Opcode support case study is a dead link

[LanceAddison]

Describe the enhancement

Under boss bridge I noticed the opcode support case study link no longer works. I'm not sure of a relevant replacement but I wanted to create an issue so it could be fixed.

[EngrPips]

Hello @LanceAddison, Thanks for this contribution. This will be attended to appropriately as soon as possible.

[gin]

The link about ZKsync works
https://github.com/Cyfrin/security-and-auditing-full-course-s23?tab=readme-ov-file#exploits-opcode-support