message: Beta production instructions update
diff: @@ -67,13 +67,13 @@ $ git push rust-lang rust-lang/master:beta -f
  Send a PR to the freshly created beta branch of rust-lang/rust
  which:
  -* Update src/stage0.txt to bootstrap from the freshly minted stable
  - compiler. The format is "X.Y.Z-YYYY-MM-DD", and the date is the
  - archive date the stable build was uploaded. Note that you'll need to update
  - `src/bootstrap/bootstrap.py` to pull from `dev-static.rust-lang.org` instead
  - of `static.rust-lang.org` as the stable release isn't published yet. Later
  - you'll send a PR to bootstrap from the `static.rust-lang.org` location after
  - the release.
  +* Update src/stage0.txt
  + * Change `date` to "YYYY-MM-DD" where the date is the archive date the stable
  + build was uploaded
  + * Change `rustc` to "X.Y.Z" where that's the version of rustc you just build
  + * Change `cargo` to "A.B.C" where it's Cargo's version. That's typically
  + "0.(Y+1).0" wrt the rustc version.
  + * Uncomment `dev: 1`
  * Update src/ci/run.sh to pass "--release-channel=beta".
  * Update the cargo submodule to the head of the versioned branch
  * Update the rls submodule to the head of the versioned branch
  