Rename 'make tests' to 'make test' in workflow

.github/workflows/c-cpp.yml

@@ -15,7 +15,7 @@ jobs:
     - uses: actions/checkout@v4
     - name: make
       run: make
-    - name: make tests
-      run: make tests
+    - name: make test
+      run: make test
     - name: make examples
       run: make examples