SR: Fix config path

Author: Haarolean

contract/src/main/resources/swagger/kafka-sr-api.yaml

@@ -165,7 +165,7 @@ paths:
                             schema:
                                 $ref: '#/components/schemas/SubjectId'
 
-    /config/:
+    /config:
         get:
             tags:
                 - KafkaSrClient