Update pull_request_template.md

Author: Syed-Shahidh-Ilhan

.github/pull_request_template.md

@@ -3,7 +3,7 @@
 
 ## Related Issues
 <!-- List any related issues that this PR addresses or fixes -->
-- #ISS-
+- work-item:
 
 ## Type of Change
 <!-- Mark the appropriate option with an "x" -->