[AIRFLOW-XXX] Add Fuller, Inc. to list of Airflow users (#5280)

README.md

@@ -199,6 +199,7 @@ Currently **officially** using Airflow:
 1. [Flipp](https://www.flipp.com) [[@sethwilsonwishabi](https://github.com/sethwilsonwishabi)]
 1. [Format](https://www.format.com) [[@format](https://github.com/4ormat) & [@jasonicarter](https://github.com/jasonicarter)]
 1. [FreshBooks](https://github.com/freshbooks) [[@DinoCow](https://github.com/DinoCow)]
+1. [Fuller, Inc.](https://en.fuller-inc.com/) [[@wutali](https://github.com/wutali) & [@sh-tech](https://github.com/sh-tech)]
 1. [Fundera](https://fundera.com) [[@andyxhadji](https://github.com/andyxhadji)]
 1. [G Adventures](https://gadventures.com) [[@chchtv11](https://github.com/chchtv11), [@tgumbley](https://github.com/tgumbley), [@tomwross](https://github.com/tomwross)]
 1. [GameWisp](https://gamewisp.com) [[@tjbiii](https://github.com/TJBIII) & [@theryanwalls](https://github.com/theryanwalls)]