The update bumps the version of Facebook Messenger to v22.214.171.124 and has the following change log which is similar to last update:
- The app is now faster
- Message people while you are not on Facebook
- Ability to sync phone contacts with one tap
- Enter the phone number of a person to start texting him from the app
- Ability to add drawings and text to photos before sending them
The update seems to be a bug fixing one and is available for download from Store. The update will be installed automatically otherwise, you may manually install it from the instructions in this article.