Update issue template for code dependencies (#676)

Author: MattMcL4475

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,6 +7,8 @@ assignees: ''
 
 ---
 
+*Note: CoA uses TES as a submodule.  Please consider creating this issue in the TES repository if you identify the root cause is there: https://github.com/microsoft/ga4gh-tes*
+
 **Problem:**
 A clear and concise description of what the problem is.
 
@@ -16,6 +18,12 @@ A clear and concise description of what you want to happen.
 **Describe alternatives you've considered**
 A clear and concise description of any alternative solutions or features you've considered.
 
+**Code dependencies**
+Will this require code changes in:
+* CoA, for new and/or existing deployments?
+* Build pipeline?
+* Integration tests?
+
 **Additional context**
 Add any other context or screenshots about the feature request here.