Adds room version to test api

Author: Beff42

src/openapi/TiMessengerTestTreiber.yaml

@@ -2188,6 +2188,10 @@ components:
           type: string
           description: "The room identifier. Must be returned in response to a createRoom request. Is used to identify a specific room."
           example: "!dowjfsdkjfskjdfsd:gematik.de"
+        roomVersion:
+          type: string
+          description: "The room version"
+          example: "10"
 
     RoomMembershipState:
       description: "An accounts membership state for a room"