Your project must not contain invalid YAML files

More information: https://insight.symfony.com/what-we-analyse/symfony.configuration.yaml_syntax_error

in .github/workflows/rel.yml, line 61 
  6.   build:
    Duplicate key "build" detected at line 61.
    Time to fix: about 15 minutes
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                                    Last edited  by Arnaud Ligny
                    
  7.     name: Create release on tag
  8.     runs-on: ubuntu-latest
  9.     steps:
  10.       - name: Checkout source code
  11.         uses: actions/checkout@v4