add final changes about tagged showroom repos

CHANGELOG.md

@@ -43,8 +43,6 @@ Beta stage release matching the release of datalad v0.12.0.
 - Include `datalad download-url` in first chapter to emphasize provenance capture
   abilities of DataLad ([#294][])
 
-
-
 #### Usecases
 
 - Use case "An automatically reproducible analysis of public neuroimaging data" ([#205][])
@@ -62,6 +60,9 @@ Beta stage release matching the release of datalad v0.12.0.
 
 - Illustrations from [undraw.co][undraw] (starting in [#329][])
 
+- Tagged "showroom" repositories with branches reflecting dataset states at different
+  book sections ([#341][])
+
 
 
 ## v0.1 (Oct. 10 2019) -- A lazy afternoon read
@@ -119,4 +120,5 @@ Alpha stage release with handbook content covering most of the core commands.
 [#295]: https://github.com/datalad-handbook/book/pull/295
 [#304]: https://github.com/datalad-handbook/book/pull/304
 [#326]: https://github.com/datalad-handbook/book/pull/326
-[#329]: https://github.com/datalad-handbook/book/pull/329
+[#329]: https://github.com/datalad-handbook/book/pull/329
+[#341]: https://github.com/datalad-handbook/book/pull/341