CI: Remove DOCKER_PASS usage

Author: effigies

.circleci/config.yml

@@ -343,8 +343,8 @@ jobs:
       - run:
           name: Docker authentication
           command: |
-            if [[ -n $DOCKER_PASS ]]; then
-              docker login -u $DOCKER_USER -p $DOCKER_PASS
+            if [[ -n $DOCKER_PAT ]]; then
+              echo "$DOCKER_PAT" | docker login -u $DOCKER_USER --password-stdin
             fi
       - run:
           name: Set up Docker registry