Extend awards action (#1939)

* remove debug job, restrict create-pull-request to only awards.txt, add documentation

* make create-pull-request use a custom branch, and filter that out, so PRs generated by action don't invoke action again

* add permissions: line

* pull-requests write instead of all

---------

Co-authored-by: Keyan <34140557+huumn@users.noreply.github.com>

.github/workflows/extend-awards.yml

@@ -5,6 +5,8 @@ on:
     types: [ closed ]
     branches:
       - master
+permissions:
+  pull-requests: write
 jobs:
   if_merged:
     if: |