[Docs] Fix typo in composite aggregation (#28891)

docs/reference/aggregations/bucket/composite-aggregation.asciidoc

@@ -352,7 +352,7 @@ and in ascending order when comparing values from the `terms` source.
 
 The `size` parameter can be set to define how many composite buckets should be returned.
 Each composite bucket is considered as a single bucket so setting a size of 10 will return the
-first 1O composite buckets created from the values source.
+first 10 composite buckets created from the values source.
 The response contains the values for each composite bucket in an array containing the values extracted
 from each value source.