Create custom.md

Author: jmulford-bw

.github/ISSUE_TEMPLATE/custom.md

@@ -0,0 +1,10 @@
+---
+name: Autogen Notice
+about: Notices the issue opener that this repo contains autogenerated code
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Hi! Thank you for opening up an issue with us! This repo contains autogenerated code, and changes need to be on our upstream source. Please open a [support ticket](https://support.bandwidth.com/) to reach out to us!