Fix unit test workflow

.github/workflows/test.yml

@@ -9,14 +9,14 @@ jobs:
     tests:
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v4
-            - name: 'Setup jq'
-              uses: dcarbone/install-jq-action@v3
-            - name: 'Check jq'
-              run: |
-                which jq
-                jq --version
-            - name: Test with shunit2 
-              uses: sudo-bot/action-shunit2@latest
+            - name: Checkout shell test framework
+              uses: actions/checkout@v4
               with:
-                cli: "./tests/test_ada.sh"
+                repository: kward/shunit2
+                path: ${{github.workspace}}/tests/shunit2
+                fetch-depth: 1
+              - name: Run unit tests
+                shell: bash
+                run: |
+                  ./tests/test_ada.sh
+