Update PULL_REQUEST_TEMPLATE.md

Author: lowlydba

.github/PULL_REQUEST_TEMPLATE.md

@@ -6,7 +6,7 @@
 <!--- Why is this change required? What problem does it solve? -->
 
 <!--- Associated issue number -->
-**Issue:** 
+**Issue:** Fixes 
 
 ## How Has This Been Tested?
 <!--- Please describe in detail how you tested your changes. -->