Merge branch 'PowerGrid' into 'NIFTy_5'

fix gridder URL

See merge request !328
11 jobs for NIFTy_5 in 20 minutes and 12 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Build Docker
passed build_docker_from_scratch #878944

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  Test
passed test_mpi #878946

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passed test_serial #878945

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80.0%
 
  Release
passed pages #878947

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  Demo Runs
passed run_bernoulli #878952

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passed run_curve_fitting #878953

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passed run_getting_started_1 #878949

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passed run_getting_started_2 #878950

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passed run_getting_started_3 #878951

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passed run_ipynb #878948

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  Deploy
passed pages:deploy

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