Update pull_request_template.md

Author: rafguevara14

.github/pull_request_template.md

@@ -21,3 +21,9 @@ View on github
 <!-- Include a link to the appropriate issue -->
 
 https://docs.github.com/en/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax#referencing-issues-and-pull-requests
+
+## PR Review Rules 
+
+1. Reviewer is responsible for resolving any threads they started
+2. One commit per thread and if it's a widespread change, link the commit in the reply pls :)
+3. ...