Sonarcloud fix

Signed-off-by: Leonardo Carreras <leonardo.carreras@eonerc.rwth-aachen.de>

.github/workflows/sonar_cloud.yaml

@@ -11,7 +11,7 @@ jobs:
   sonarcloud:
     name: Prepare and run Sonar Scan
     runs-on: ubuntu-latest
-    if: secrets.SONAR_TOKEN != '' # Skip the job if SONAR_TOKEN is not set
+    if: ${{ secrets.SONAR_TOKEN }} != '' # Skip the job if SONAR_TOKEN is not set
     container: sogno/dpsim:dev
     env:
       BUILD_WRAPPER_OUT_DIR: build_wrapper_output_directory # Directory where build-wrapper output will be placed