Rename default branch to main

.circleci/config.yml

@@ -25,7 +25,7 @@ jobs:
       - run:
           name: Deploy
           command: |
-            if [ "${CIRCLE_BRANCH}" == "master" ]; then
+            if [ "${CIRCLE_BRANCH}" == "main" ]; then
               ./bin/push-image.sh << parameters.imageName >>
             fi