Update releasing.md with more pre-release steps (dart-archive/linter#3901)

Author: srawlins

doc/releasing.md

@@ -4,11 +4,27 @@
 
 Before releasing there are a few boxes to tick off.
 
-* [ ] Is there a [milestone plan](https://github.com/dart-lang/linter/issues?q=is%3Aopen+is%3Aissue+label%3Amilestone-plan) for the release? If so, has it been updated?
-* [ ] Is the changelog up to date? (Look at commit history to verify.)
+* [ ] Is there a [milestone plan](https://github.com/dart-lang/linter/issues?q=is%3Aopen+is%3Aissue+label%3Amilestone-plan)
+      for the release? If so, has it been updated?
+* [ ] Is the changelog up to date? (Look at
+      [commit history](https://github.com/dart-lang/linter/commits/main) to verify.)
   * [ ] Chronological order is fine.
+  * [ ] Most changes should make it into the changelog, but internal cleanups
+        and small documentation fixes do not need to be included.
 * [ ] Does the `AUTHORS` file need updating?
-* [ ] Spot check new lint rules for [naming consistency](https://github.com/dart-lang/linter/blob/main/doc/writing-lints.md).  Rename as needed.
+* [ ] Spot check new lint rules for
+      [naming consistency](https://github.com/dart-lang/linter/blob/main/doc/writing-lints.md).
+      Rename as needed.
+* [ ] Test your candidate release against the Dart SDK, Flutter, and google3
+      by creating a PR in gerrit:
+  * [ ] Upload a Dart SDK Gerrit CL with
+        [DEPS](https://github.com/dart-lang/sdk/blob/main/DEPS) pointing to the
+        main branch's HEAD commit.
+  * [ ] Run the `flutter-analyze` and `flutter-engine-linux`. These trybots will
+        highlight code in various Flutter repositories, and internal to Google,
+        which needs to be cleaned up before the linter release can land in the
+        Dart SDK.
+        TODO(srawlins): Document how to run a global presubmit for Google internal.
 
 ## Doing the Push
 
@@ -19,9 +35,9 @@ First, make sure the build is GREEN.
 All clear?  Then:
 
   1. Update `pubspec.yaml` with a version bump and `CHANGELOG.md` accordingly.
-  2. Tag a release [branch](https://github.com/dart-lang/linter/releases).
+  2. Update Dart SDK's [DEPS](https://github.com/dart-lang/sdk/blob/main/DEPS).
   3. Publish to `pub.dev` (`dart pub lish`); heed all warnings that are not test data related!
-  4. Update SDK `DEPS`.
+  4. Tag a release [branch](https://github.com/dart-lang/linter/releases).
 
 You're done!