ci/docs: finalize transition to main branch

.circleci/config.yml

@@ -113,7 +113,7 @@ jobs:
       - run:
           name: Check upgrade testing
           command: |
-            if [ "$CIRCLE_BRANCH" == "master" ]; then
+            if [ "$CIRCLE_BRANCH" == "main" ]; then
                 echo "On master, no upgrade to test..."
                 circleci-agent step halt
             else

.github/workflows/integration-test.yaml

@@ -71,7 +71,7 @@ jobs:
             - name: "Int. tests: Ubuntu 22.04, Py 3.10, --upgrade"
               distro_image: "ubuntu:22.04"
               extra_flags: --upgrade
-              dont_run_on_ref: refs/heads/master
+              dont_run_on_ref: refs/heads/main
 
   integration-tests:
     needs: decide-on-test-jobs-to-run

README.md

@@ -2,7 +2,7 @@
 
 [![Documentation build status](https://img.shields.io/readthedocs/the-littlest-jupyterhub?logo=read-the-docs)](https://tljh.jupyter.org/en/latest/?badge=latest)
 [![GitHub Workflow Status - Test](https://img.shields.io/github/workflow/status/jupyterhub/the-littlest-jupyterhub/Unit%20tests?logo=github&label=tests)](https://github.com/jupyterhub/the-littlest-jupyterhub/actions)
-[![Test coverage of code](https://codecov.io/gh/jupyterhub/the-littlest-jupyterhub/branch/master/graph/badge.svg)](https://codecov.io/gh/jupyterhub/the-littlest-jupyterhub)
+[![Test coverage of code](https://codecov.io/gh/jupyterhub/the-littlest-jupyterhub/branch/main/graph/badge.svg)](https://codecov.io/gh/jupyterhub/the-littlest-jupyterhub)
 [![GitHub](https://img.shields.io/badge/issue_tracking-github-blue?logo=github)](https://github.com/jupyterhub/the-littlest-jupyterhub/issues)
 [![Discourse](https://img.shields.io/badge/help_forum-discourse-blue?logo=discourse)](https://discourse.jupyter.org/c/jupyterhub/tljh)
 [![Gitter](https://img.shields.io/badge/social_chat-gitter-blue?logo=gitter)](https://gitter.im/jupyterhub/jupyterhub)