added changelog of sms bridge

CHANGELOG.md

@@ -1,3 +1,11 @@
+# 2020-06-11
+
+## SMS bridging requires db reset
+
+The current version of [matrix-sms-bridge](https://github.com/benkuly/matrix-sms-bridge) needs you to delete the database to work as expected. Just remove `/matrix/matrix-sms-bridge/database/*`. It also adds a new requried var `matrix_sms_bridge_default_region`.
+
+To reuse your existing rooms, invite `@smsbot:yourServer` to the room or write a message. You are also able to use automated room creation with telephonenumers by writing `sms send -t 01749292923 "Hello World"` in a room with `@smsbot:yourServer`. See [the docs](https://github.com/benkuly/matrix-sms-bridge) for more information.
+
 # 2020-06-05
 
 ## SMS bridging support