[DOCS] Fix typo in anomaly detection at scale

Author: lcawl

docs/en/stack/ml/anomaly-detection/anomaly-detection-scale.asciidoc

@@ -171,7 +171,7 @@ more efficient to use an aggregation when it’s possible, as in this case, the
 data node does the heavy-lifting instead of the {ml} node.
 
 You may want to use `chunking_config` to tune your search speed when your 
-{dfees} use aggregations. In these cases, set `chunking_config.mode` to `manual` 
+{dfeeds} use aggregations. In these cases, set `chunking_config.mode` to `manual` 
 and experiment with the `time_span` value. Increasing it may speed up search. 
 However, the higher the chunking `time_span`, the higher number of buckets are 
 included in the search response. Thus, if you hit the `search.max_buckets`