Update Transitions.md

Author: svgeesus

Transitions.md

@@ -37,8 +37,11 @@ Writing Modes (updated CR with technical changes)
   * working on the tests and finalizing the test report
   * [wg resolution for PR](https://lists.w3.org/Archives/Public/www-style/2017May/0032.html) 17 May 2017
   * [wg resolution for updated CR](https://github.com/w3c/csswg-drafts/issues/1391#issuecomment-320215251) 04 Aug 2017
-  * next steps: update DoC and changes section, write transition request
-
+  * [transition request](https://github.com/w3c/csswg-drafts/blob/master/css-flexbox/transition-updated-cr-2017-09.md) [26 Sept 2017](https://lists.w3.org/Archives/Member/chairs/2017JulSep/0184.html)
+  
+ Backgrounds & Borders (updated CR with technical changes)
+  * [group decision](https://lists.w3.org/Archives/Public/www-style/2017Sep/0054.html)
+  * next step: Thierry writing transition request
 
 ## Proposed Recommendation