remove the "&"

Author: bitterpanda63

.github/workflows/end2end.yml

@@ -74,8 +74,8 @@ jobs:
       - name: Start Application (with and without Zen)
         working-directory: ./sample-apps/${{ matrix.app.name }}
         run: |
-          nohup make run > output.log &
-          nohup make runWithoutZen > output_without_zen.log &
+          nohup make run > output.log
+          nohup make runWithoutZen > output_without_zen.log
 
       - name: Run End-to-End tests
         working-directory: ./