fix(ingest/kafka-connect): update connection test url

When using confluent cloud, GET does work on root but works on
/connectors endpoint

metadata-ingestion/src/datahub/ingestion/source/kafka/kafka_connect.py

@@ -315,9 +315,9 @@ def get_parser(
             transforms.append(transform)
             for key in self.connector_manifest.config.keys():
                 if key.startswith(f"transforms.{name}."):
-                    transform[
-                        key.replace(f"transforms.{name}.", "")
-                    ] = self.connector_manifest.config[key]
+                    transform[key.replace(f"transforms.{name}.", "")] = (
+                        self.connector_manifest.config[key]
+                    )
 
         return self.JdbcParser(
             db_connection_url,
@@ -428,9 +428,9 @@ def _extract_lineages(self):
         self.connector_manifest.flow_property_bag = self.connector_manifest.config
 
         # Mask/Remove properties that may reveal credentials
-        self.connector_manifest.flow_property_bag[
-            "connection.url"
-        ] = parser.db_connection_url
+        self.connector_manifest.flow_property_bag["connection.url"] = (
+            parser.db_connection_url
+        )
         if "connection.password" in self.connector_manifest.flow_property_bag:
             del self.connector_manifest.flow_property_bag["connection.password"]
         if "connection.user" in self.connector_manifest.flow_property_bag:
@@ -804,9 +804,9 @@ def get_parser(
             transforms.append(transform)
             for key in self.connector_manifest.config.keys():
                 if key.startswith(f"transforms.{name}."):
-                    transform[
-                        key.replace(f"transforms.{name}.", "")
-                    ] = self.connector_manifest.config[key]
+                    transform[key.replace(f"transforms.{name}.", "")] = (
+                        self.connector_manifest.config[key]
+                    )
 
         if "defaultDataset" in connector_manifest.config:
             defaultDataset = connector_manifest.config["defaultDataset"]
@@ -1155,7 +1155,7 @@ def __init__(self, config: KafkaConnectSourceConfig, ctx: PipelineContext):
             )
             self.session.auth = (self.config.username, self.config.password)
 
-        test_response = self.session.get(f"{self.config.connect_uri}")
+        test_response = self.session.get(f"{self.config.connect_uri}/connectors")
         test_response.raise_for_status()
         logger.info(f"Connection to {self.config.connect_uri} is ok")
         if not jpype.isJVMStarted():