Update issue templates

Author: seanmcilroy29

.github/ISSUE_TEMPLATE/ref-material-submissions.md

@@ -0,0 +1,14 @@
+---
+name: Ref Material submissions
+about: Suggested Reference Material submission
+title: "[Ref Material]"
+labels: ''
+assignees: seanmcilroy29
+
+---
+
+## Reference Material
+{Outline Reference Material updates}
+
+
+## Additional comments/material