fix typo (#15747)

docs/connector-development/config-based/overview.md

@@ -54,7 +54,7 @@ A stream is defined by:
 2. Primary key (Optional): Used to uniquely identify records, enabling deduplication. Can be a string for single primary keys, a list of strings for composite primary keys, or a list of list of strings for composite primary keys consisting of nested fields.
 3. [Schema](../cdk-python/schemas.md): Describes the data to sync
 4. [Data retriever](overview.md#data-retriever): Describes how to retrieve the data from the API
-5. [Cursor field](../cdk-python/incremental-stream.md) (Optional): Field to use used as stream cursor. Can either be a string, or a list of strings if the cursor is a nested field.
+5. [Cursor field](../cdk-python/incremental-stream.md) (Optional): Field to use as stream cursor. Can either be a string, or a list of strings if the cursor is a nested field.
 6. [Transformations](./record-selector.md#transformations) (Optional): A set of transformations to be applied on the records read from the source before emitting them to the destination
 7. [Checkpoint interval](https://docs.airbyte.com/understanding-airbyte/airbyte-protocol/#state--checkpointing) (Optional): Defines the interval, in number of records, at which incremental syncs should be checkpointed.