ci: test github actions

.github/workflows/sub_test.yaml

@@ -41,6 +41,22 @@ jobs:
  build:
  runs-on: ubuntu-latest
  steps:
+ -
+ name: Free Disk Space (Ubuntu)
+ uses: jlumbroso/free-disk-space@main
+ with:
+ # this might remove tools that are actually needed,
+ # if set to "true" but frees about 6 GB
+ tool-cache: false
+
+ # all of these default to true, but feel free to set to
+ # "false" if necessary for your workflow
+ android: true
+ dotnet: true
+ haskell: true
+ large-packages: true
+ docker-images: true
+ swap-storage: true
  -
  name: Checkout
  uses: actions/checkout@v4