Auto merge of #45616 - fhartwig:ptr-docs, r=dtolnay
Auto merge of #45616 - fhartwig:ptr-docs, r=dtolnay

Fix references to zero_memory and copy_memory in ptr docs

Fixes #45606

graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust