update maintenance guide with recent news

MAINTENANCE.md

@@ -1,5 +1,12 @@
 This document explains how to perform the project's maintenance tasks.
 
+### Repository Configuration
+
+Some repository settings, including branch protection and required approvals, are managed in the
+[Rust team repo](https://github.com/rust-lang/team/blob/master/repos/rust-lang/flate2-rs.toml).
+See the [repository schema](https://github.com/rust-lang/team/blob/aaa8039a2420a07cab9bbaca3885b3ad95a256a7/docs/toml-schema.md?plain=1#L248)
+for supported directives.
+
 ### Creating a new release
 
 #### Artifacts
@@ -11,11 +18,11 @@ This document explains how to perform the project's maintenance tasks.
 
 To generate all the artifacts above, one proceeds as follows:
 
-1. `git checkout -b release-<next-version>` - move to a branch to prepare making changes to the repository. *Changes cannot be made to `main` as it is protected.*
-2. Edit `Cargo.toml` to the next package version.
-3. `gh pr create` to create a new PR for the current branch and **get it merged**.
+1. `git checkout -b release-<next-version>` - create a branch to make changes to the repository. *Changes cannot be made to `main` as it is protected.*
+2. Edit `Cargo.toml` to update the package version to `<next-version>`.
+3. Create a new PR for the branch (e.g. using `gh pr create`) and **get it approved and merged**.
+4. Pull the `main` branch and ensure that you are at the merged commit.
 4. `cargo publish` to create a new release on `crates.io`.
 5. `git tag <next-version>` to remember the commit.
 6. `git push --tags` to push the new tag.
 7. Go to the newly created release page on GitHub and edit it by pressing the "Generate Release Notes" and the `@` button. Save the release.
-