docs(image): Update browser bugs section for Safari 16.4 release (#47577)
### What?
Safari 16.4, released today, fixed a known browser bug [around lazy-loading images](https://webkit.org/blog/13966/webkit-features-in-safari-16-4/#:~:text=Now%20in%20Safari%2016.4%2C%20a%20gray%20line%20no%20longer%20appears%20to%20mark%20the%20space%20where%20a%20lazy%2Dloaded%20image%20will%20appear%20once%20it%E2%80%99s%20been%20loaded.).
### Why?
This bug is mentioned in the docs & the fix has been long-awaited by @styfle & users.
### How?
I've updated the next/image doc with this link.