core, legacy: update Changelogs to reflect the release

core/ChangeLog

@@ -1,8 +1,9 @@
 Version 2.x.x [not yet released]
 
-Version 2.3.1 [Jun 2020 RC, not yet released]
+Version 2.3.1 [Jun 2020]
 * Refactor Bitcoin signing
 * Refactor Keychain into a decorator
+* Stream previous tx also for Segwit inputs
 
 Version 2.3.0 [Apr 2020]
 * Passphrase redesign

legacy/firmware/ChangeLog

@@ -1,7 +1,7 @@
 Version 1.x.x [not yet released]
 
-Version 1.9.1 [Jun 2020 RC, not yet released]
-*
+Version 1.9.1 [Jun 2020]
+* Stream previous tx also for Segwit inputs
 
 Version 1.9.0 [Apr 2020]
 * Disallow changing of settings via dry-run recovery