Auto merge of #5295 - matthiaskrgr:lints_readme, r=flip1995
Auto merge of #5295 - matthiaskrgr:lints_readme, r=flip1995

clippy_lints: readme: don't mention crates.io since it is no longer used to publish clippy

changelog: none

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