/password: formalise 'default' for logout_devices

data/api/client-server/registration.yaml

@@ -352,9 +352,10 @@ paths:
                 example: "ihatebananas"
               logout_devices:
                 type: boolean
+                default: true
                 description: |-
                   Whether the user's other access tokens, and their associated devices, should be
-                  revoked if the request succeeds. Defaults to true.
+                  revoked if the request succeeds.
 
                   When `false`, the server can still take advantage of the [soft logout method](/client-server-api/#soft-logout)
                   for the user's remaining devices.