Let valgrind return a non-zero error code (0 = success on bash) if there are memory leaks because otherwise it returns the return code of the software its running

Author: aentinger

Diff for: .github/workflows/unit-tests.yml

@@ -35,7 +35,7 @@ jobs:
           cd "$BUILD_PATH"
           cmake ..
           make
-          valgrind --leak-check=yes bin/testArduinoIoTCloud
+          valgrind --leak-check=yes --error-exitcode=1 bin/testArduinoIoTCloud
 
       - name: Check code coverage
         run: |