Update pull_request_template.md

Author: mishmosh

.github/pull_request_template.md

@@ -1,8 +1,10 @@
-<!-- Thanks for your contribution! Please review the contributing guidelines before submitting: https://codeforphilly.github.io/chime/CONTRIBUTING.html -->
+<!-- Thanks for your contribution! Please read the contributing guidelines before submitting: https://codeforphilly.github.io/chime/CONTRIBUTING.html -->
 
-### Summary
-- This PR affects {Operations | Deployment | Model}.
-- Fixes #(relevant issue number or numbers).
+<!--
+- If this PR affects devops or model, start your PR title with `[DevOps]` or `[Model]`
+- Update any corresponding user or developer documentation, if affected.
+-->
 
 ### Description
+- Fixes #(relevant issue number or numbers).
 - Short description of problem & solution, for copying into changelog. (1-3 sentences, depending on scope of change)