Function prependReleaseNotesToChangelog

ng-dev/release/publish/actions.ts:387–392

* Prepend releases notes for a version published in a given branch to the changelog in * the current Git `HEAD`. This is useful for cherry-picking the changelog. * @returns A boolean indicating whether the release notes have been prepended.

(releaseNotes: ReleaseNotes)

   * @returns A boolean indicating whether the release notes have been prepended.
   */
  protected async prependReleaseNotesToChangelog(releaseNotes: ReleaseNotes): Promise<void> {
    await releaseNotes.prependEntryToChangelogFile();
    Log.info(
      green(`  ✓   Updated the changelog to capture changes for "${releaseNotes.version}".`),
    );
  }

  /** Checks out an upstream branch with a detached head. */
  protected async checkoutUpstreamBranch(branchName: string) {