Auto merge of #136751 - bjorn3:update_rustfmt, r=Mark-Simulacrum

Update bootstrap compiler and rustfmt

The rustfmt version we previously used formats things differently from what the latest nightly rustfmt does. This causes issues for subtrees that get formatted both in-tree and in their own repo. Updating the rustfmt used in-tree solves those issues. Also bumped the bootstrap compiler as the stage0 update command always updates both at the same
time.

Author: bors