[release-6.1] Bump toolchain to nightly-2022-02-14#7197

Merged

ti-chi-bot merged 1 commit intopingcap:release-6.1from breezewish:release-6.1-bump-rust-toolchain

Mar 31, 2023

+1-1

Commits on Mar 31, 2023

Bump toolchain to nightly-2022-02-14, which is identical to tiflash-proxy
breezewish
committed