Check headers with unbeheader

.github/workflows/ci.yml

@@ -161,9 +161,9 @@ jobs:
       - name: Check headers
         if: success() || failure()
         run: |
-          wget "https://raw.githubusercontent.com/indico/indico/${INDICO_BRANCH}/bin/maintenance/update_header.py" -O /tmp/update_header.py
+          pipx install unbeheader==1.2.0
           echo '::add-matcher::.github/matchers/headers-problem-matcher.json'
-          python /tmp/update_header.py --ci
+          unbeheader --check
           echo '::remove-matcher owner=headers::'
 
       - name: Run flake8

headers.yml → .header.yml

@@ -1,9 +1,9 @@
 root: true
-name: CERN
+owner: CERN
 start_year: 2002
 header: |-
   {comment_start} This file is part of the Indico plugins.
-  {comment_middle} Copyright (C) {dates} {name}
+  {comment_middle} Copyright (C) {dates} {owner}
   {comment_middle}
   {comment_middle} The Indico plugins are free software; you can redistribute
   {comment_middle} them and/or modify them under the terms of the MIT License;