updated promote github action

.github/workflows/promote.yml

@@ -18,8 +18,7 @@ env:
   # Common users. We can't run a step 'if secrets.AWS_USR != ""' but we can run
   # a step 'if env.AWS_USR' != ""', so we copy these to succinctly test whether
   # credentials have been provided before trying to run steps that need them.
-  DOCKER_USR: ${{ secrets.DOCKER_USR }}
-  AWS_USR: ${{ secrets.AWS_USR }}
+  DOCKER_USR: ${{ github.actor }}
 
 jobs:
   promote-artifacts:
@@ -43,15 +42,14 @@ jobs:
         uses: docker/login-action@v1
         if: env.DOCKER_USR != ''
         with:
+          registry: ghcr.io
           username: ${{ secrets.DOCKER_USR }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Promote Artifacts in S3 and Docker Hub
-        if: env.AWS_USR != '' && env.DOCKER_USR != ''
+        if: env.DOCKER_USR != ''
         run: make -j2 promote BRANCH_NAME=${GITHUB_REF##*/}
         env:
           VERSION: ${{ github.event.inputs.version }}
           CHANNEL: ${{ github.event.inputs.channel }}
-          AWS_ACCESS_KEY_ID: ${{ secrets.AWS_USR }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_PSW }}
-
+