Update delivery/overview.mdx

Co-authored-by: congyi wang <[email protected]>
Signed-off-by: IrisWan <[email protected]>

delivery/overview.mdx

@@ -134,7 +134,7 @@ RisingWave implements batching strategies for file sinks to optimize file manage
 There are two primary batching strategies:
 
 - **Batching based on row numbers**:
-    For batching based on row count, RisingWave checks whether the maximum row count threshold has been reached after each chunk is written (`sink_writer.write_batch()`). If the threshold is met, the writing of the file is completed.
+    For batching based on row count, RisingWave checks whether the maximum row count threshold has been reached after each write operation. If the threshold is met, the writing of the file is completed.
 
 - **Batching based on rollover interval**:
     For batching based on the time interval, RisingWave checks the threshold each time a chunk is about to be written and when a barrier is encountered).