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 Job ID Name Coverage
  Build Docker
passed #878944
build_docker_from_scratch

00:11:22

 
  Test
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test_mpi

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passed #878945
test_serial

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80.0%
 
  Release
passed #878947
pages

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  Demo Runs
passed #878952
run_bernoulli

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passed #878953
run_curve_fitting

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passed #878949
run_getting_started_1

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passed #878950
run_getting_started_2

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passed #878951
run_getting_started_3

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passed #878948
run_ipynb

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  Deploy
passed pages:deploy

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