message: Fix the OS used on CI
diff: @@ -39,7 +39,7 @@ concurrency:
  jobs:
  integration-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  timeout-minutes: 60
  strategy:
  fail-fast: false
  @@ -115,7 +115,7 @@ jobs:
  --nocapture --test-threads=2
  multi-chains-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  if: github.ref == 'refs/heads/master'
  timeout-minutes: 60
  strategy:
  @@ -226,7 +226,7 @@ jobs:
  --nocapture --test-threads=2
  ordered-channel-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  timeout-minutes: 60
  steps:
  - uses: actions/checkout@v2
  @@ -258,7 +258,7 @@ jobs:
  --nocapture --test-threads=1 test_ordered_channel
  ica-filter-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  steps:
  - uses: actions/checkout@v2
  - uses: cachix/install-nix-action@v15
  @@ -290,7 +290,7 @@ jobs:
  --nocapture --test-threads=1 test_ica_filter
  ics29-fee-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  strategy:
  fail-fast: false
  matrix:
  @@ -333,7 +333,7 @@ jobs:
  --nocapture --test-threads=1 fee::
  forward-packet:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  strategy:
  fail-fast: false
  matrix:
  @@ -376,7 +376,7 @@ jobs:
  --nocapture --test-threads=1 forward::
  model-based-test:
  - runs-on: ubuntu-21.10
  + runs-on: ubuntu-20.04
  timeout-minutes: 60
  strategy:
  matrix:
  