Update GitHub Actions workflow for tests

Updated GitHub Actions workflow to use checkout@v4 and modified test command to include coverage reporting.

Author: faresrafat3

.github/workflows/tests.yml

@@ -12,13 +12,13 @@ jobs:
       matrix:
         python-version: ["3.11", "3.12"]
     steps:
-      - uses: actions/checkout@v7
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install
         run: |
           python -m pip install --upgrade pip
           pip install -e ".[dev]"
-      - name: Test
-        run: pytest -q
+      - name: Test (blocking)
+        run: pytest --cov=epistemic_forge --cov-report=term-missing --cov-fail-under=70