Update system-tests-merge.yaml

Author: franvila

.github/workflows/system-tests-merge.yaml

@@ -52,7 +52,7 @@ jobs:
         run: |
           output=$(grep "^[ A-Z]" ./src/main/java/io/kroxylicious/systemtests/enums/KafkaClientType.java | grep -v "\*")
           output="${output##*( )}"
-          TEST_CLIENTS="[$(echo $output | tr '[:upper:]' '[:lower:]')]"
+          TEST_CLIENTS="[$( echo $output | tr '[:upper:]' '[:lower:]' | sed 's/, */,/g' | sed 's/[^,]*/"&"/g')]"
           echo $TEST_CLIENTS
           #TEST_CLIENTS="['strimzi_test_client', 'python_test_client', 'kaf', 'kcat']"
           echo "test_clients=$TEST_CLIENTS" >> $GITHUB_OUTPUT