doc: improve commit message example for releases

doc/contributing/releases.md

@@ -406,6 +406,27 @@ good place to @-mention the relevant contributors.
 After opening the PR, update the release commit to include `PR-URL` metadata and
 force-push the proposal.
 
+If using the `<details>` tag:
+
+```markdown
+<details>
+<summary>Commits</summary>
+
+* Full list of commits...
+</details>
+PR-URL: TDB
+```
+
+In case the adopted format is the same as the changelog one:
+
+```markdown
+Notable changes:
+
+* Copy the notable changes list here, reformatted for plain-text
+
+PR-URL: TBD
+```
+
 ### 7. Ensure that the release branch is stable
 
 Run a **[`node-test-pull-request`](https://ci.nodejs.org/job/node-test-pull-request/)**