message: fix markdown in changelog
diff: * Add support for Cisco Jabber. Thanks to @qiongfangzhang and @panx981389 and their team at Cisco for the contribution!
  -[Documentation for the Cisco Jabber adapter can be found here)(docs/readme-ciscojabber.md)
  +[Documentation for the Cisco Jabber adapter can be found here](docs/readme-ciscojabber.md)
  * Updated `ciscospark` dependency to latest version and fixed some bugs in the example bot
  