PB-433: Setup PageBuilder Community project

- fix links

Author: omiroshnichenko

.github/PULL_REQUEST_TEMPLATE.md

@@ -32,10 +32,10 @@
 
 ### Fixed Issues (if relevant)
 <!---
-    If relevant, please provide a list of fixed issues in the format magento/partners-magento2ee#<issue_number>.
+    If relevant, please provide a list of fixed issues in the format magento/magento2-page-builder#<issue_number>.
     There could be 1 or more issues linked here and it will help us find some more information about the reasoning behind this change.
 -->
-1. magento/partners-magento2ee#<issue_number>: Issue title
+1. magento/magento2-page-builder#<issue_number>: Issue title
 
 ### Builds
 <!---