feat(sec): harden GHA ref by using its SHA ID to prevent accidental usage of compromised actions (#38782)

Signed-off-by: hainenber <dotronghai96@gmail.com>

.github/workflows/superset-python-unittest.yml

@@ -24,7 +24,7 @@ jobs:
       PYTHONPATH: ${{ github.workspace }}
     steps:
       - name: "Checkout ${{ github.ref }} ( ${{ github.sha }} )"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
         with:
           persist-credentials: false
           submodules: recursive
@@ -53,7 +53,7 @@ jobs:
         run: |
           pytest --durations-min=0.5 --cov=superset/sql/ ./tests/unit_tests/sql/ --cache-clear --cov-fail-under=100
       - name: Upload code coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@1af58845a975a7985b0beb0cbe6fbbb71a41dbad # v5
         with:
           flags: python,unit
           token: ${{ secrets.CODECOV_TOKEN }}