message: define the usage of the nightly compiler as experimental
diff: @@ -12,6 +12,9 @@ jobs:
  build:
  name: Test
  runs-on: ${{ matrix.os }}
  + # these tests based on the nightly compiler, which can be broken
  + # consequently, we continue on an error
  + continue-on-error: true
  strategy:
  matrix:
  