message: Update the Split Release Process RFC
diff: RFC: Split Release Process
  ==========================
  -> Status: RFC
  +> Status: Implemented in [smithy-rs#986](https://github.com/awslabs/smithy-rs/pull/986) and [aws-sdk-rust#351](https://github.com/awslabs/aws-sdk-rust/pull/351)
  At the time of writing, the `aws-sdk-rust` repository is used exclusively
  for the entire release process of both the Rust runtime crates from `smithy-rs` as
  @@ -168,13 +168,13 @@ Changes Checklist
  -----------------
  - In `smithy-rs`:
  - - [ ] Move publisher tool from `aws-sdk-rust` into `smithy-rs`
  - - [ ] Modify `aws:sdk:assemble` target to run the publisher `fix-manifests` subcommand
  - - [ ] Add `rust-runtime:assemble` target that generates publish-ready Smithy runtime crates
  - - [ ] Add CI step to create Smithy runtime bundle artifact
  - - [ ] Add `GITHUB_ACTIONS=true` env var check for setting the `publish` flag in generated AND runtime manifests
  - - [ ] Revise publisher tool to publish from an arbitrary directory
  + - [x] Move publisher tool from `aws-sdk-rust` into `smithy-rs`
  + - [x] Modify `aws:sdk:assemble` target to run the publisher `fix-manifests` subcommand
  + - [x] Add `rust-runtime:assemble` target that generates publish-ready Smithy runtime crates
  + - [x] Add CI step to create Smithy runtime bundle artifact
  + - [x] Add `GITHUB_ACTIONS=true` env var check for setting the `publish` flag in generated AND runtime manifests
  + - [x] Revise publisher tool to publish from an arbitrary directory
  - In `aws-sdk-rust`:
  - - [ ] Implement CI for the `aws-sdk-rust/next` branch
  - - [ ] Remove the publisher tool
  -- [ ] Update release process documentation
  + - [x] Implement CI for the `aws-sdk-rust/next` branch
  + - [x] Remove the publisher tool
  +- [x] Update release process documentation
  