Closes #3787: Update release notes section in pull_request_template.md (

#3788)

.github/pull_request_template.md

@@ -3,6 +3,21 @@
 ## Description
 <!--- Describe your changes in detail (include keywords close/fix/resolve) -->
 
+
+### Release notes
+<!--- Delete this line (and the closing comment line) to enable release notes.
+
+If this change requires release notes: provide a summary of changes, how to use this change, and any related links. This content will be pasted in the [release notes](https://github.com/az-digital/az_quickstart/releases). Use markdown format to ensure proper pasting of information. [Release notes example](https://github.com/az-digital/az_quickstart/releases/tag/2.11.0)
+
+Make sure to add the `release notes` label to this PR.
+
+```
+Add markdown of release notes here.
+```
+
+Delete this line to enable release notes.  -->
+
+
 ## Related issues
 <!--- This project only accepts pull requests related to open issues -->
 <!--- If suggesting a new feature or change, please discuss it in an issue first -->