Update a ReadMe

Author: mdmintz

help_docs/happy_customers.md

@@ -7,6 +7,7 @@
 * [Veracode](https://www.veracode.com/)
 * [Broadcom](https://www.broadcom.com/)
 * [Thoma Bravo](https://www.thomabravo.com/)
+* [Expedia Group](https://lifeatexpediagroup.com/)
 * [Texture Health](https://www.texturehealth.com/)
 * [Harvard Medical School](https://hms.harvard.edu/)
 * [Mississippi State University](https://www.msstate.edu/)
@@ -24,6 +25,7 @@
 * [VMware](https://www.vmware.com/)
 * [Ark PES](https://www.arkpes.com/)
 * [Akamai](https://www.akamai.com/)
+* [WPILib](https://wpilib.org/)
 * [Yandex](https://yandex.ru/)
 * [Baidu](https://www.baidu.com/)
 * [Iver](https://www.iver.com/)