templates/rebase: Add Communications Tracker to rebase template

Author: dustymabe

.github/ISSUE_TEMPLATE/rebase.md

@@ -7,6 +7,7 @@
 - [ ] Fedora Changes Considerations ([example](https://github.com/coreos/fedora-coreos-tracker/issues/1222))
 - [ ] Package Additions/Removals ([example](https://github.com/coreos/fedora-coreos-tracker/issues/1221))
 - [ ] Test Week ([template](https://github.com/coreos/fedora-coreos-tracker/issues/new?template=test-week.md&title=tracker:+FN+Test+Week))
+- [ ] Communications Tracker ([example](https://github.com/coreos/fedora-coreos-tracker/issues/1655))
 
 ## At Branching