Add user-facing change section to PR template

Signed-off-by: Brad Davidson <brad.davidson@rancher.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -17,7 +17,15 @@
 
 <!-- Link any related issues, pull-requests, or commit hashes that are relevant to this pull request. If you are opening a PR without a corresponding issue please consider creating one first, at https://github.com/rancher/k3s/issues . A functional example will greatly help QA with verifying/reproducing a bug or testing new features. -->
 
+#### User-Facing Change ####
+<!--
+Does this PR introduce a user-facing change? If no, just write "NONE" in the release-note block below.
+If the PR requires additional action from users switching to the new release, include the string "action required".
+-->
+```release-note
+
+```
+
 #### Further Comments ####
 
 <!-- If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you did and what alternatives you considered, etc... -->
-