[Docs] Correct typo in pipeline.asciidoc
@@ -114,7 +114,7 @@ POST /_search
=== Special Paths
Instead of pathing to a metric, `buckets_path` can use a special `"_count"` path. This instructs
-the pipeline aggregation to use the document count as it's input. For example, a moving average can be calculated on the document count of each bucket, instead of a specific metric:
+the pipeline aggregation to use the document count as its input. For example, a moving average can be calculated on the document count of each bucket, instead of a specific metric:
[source,js]
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