DEV: Update GitHub artifacts to v3

.github/workflows/test_pytest.yaml

@@ -26,12 +26,12 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
 
       - name: Cache Python dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v3
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements-tests.txt') }}
@@ -64,7 +64,7 @@ jobs:
         run: pytest tests/acceptance --cov=rocketpy --cov-append --cov-report=xml
 
       - name: Upload coverage to artifacts
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: coverage
           path: coverage.xml
@@ -75,7 +75,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Download all coverage reports
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v3
       - name: Upload to Codecov
         uses: codecov/codecov-action@v4
         with: