docs: fix for bad config service example

docs/configservices.md

@@ -168,13 +168,12 @@ class ExampleService(ConfigService):
     ]
 
     def get_text_template(self, name: str) -> str:
-        if name == "example-start.sh":
+        return """
-            return """
+        # sample script 1
-            # sample script 1
+        # node id(${node.id}) name(${node.name})
-            # node id(${node.id}) name(${node.name})
+        # config: ${config}
-            # config: ${config}
+        echo hello
-            echo hello
+        """
-            """
 ```
 
 #### Validation Mode