simplify "required" jobs

.github/workflows/ci.yaml

@@ -55,6 +55,7 @@ jobs:
     - if: matrix.external_dependency_system == 'workspace' || matrix.os == 'macos'
       run: echo "tests/rules_pycross" >> .bazelignore
     - run: bazel test //...
+
   examples:
     runs-on: ubuntu-latest
     env:
@@ -66,14 +67,22 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - run: examples/integration_test.sh
+
   determinism:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
     - run: tests/determinism/reproducible_shas.sh
+
   lint:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
     - uses: pre-commit/[email protected]
+
+  required:
+    runs-on: ubuntu-latest
+    needs: [test, examples, determinism, lint] # this automatically depends on all matrix jobs
+    steps:
+    - run: echo "All dependent jobs are required to pass"