[DOCS] Fixed typo in count function
Original commit: elastic/x-pack-elasticsearch@ca72bdd4349d3fbe12ae81cee5624ba5630f0b60
@@ -17,7 +17,7 @@ The {xpackml} features include the following count functions:
* xref:ml-count[`count`, `high_count`, `low_count`]
* xref:ml-nonzero-count[`non_zero_count`, `high_non_zero_count`, `low_non_zero_count`]
-* xref:ml-distinct-count[`distinct_count`, high_distinct_count`, `low_distinct_count`]
+* xref:ml-distinct-count[`distinct_count`, `high_distinct_count`, `low_distinct_count`]
[float]
[[ml-count]]
