Fixed typo (elastic#2678) (elastic#2727)

(cherry picked from commit 108286e)

Co-authored-by: Kartik Rajesh <[email protected]>

Author: lcawl

docs/en/stack/ml/nlp/ml-nlp-overview.asciidoc

@@ -61,6 +61,6 @@ data. You can perform the following NLP operations:
 * <<ml-nlp-classify-text>> 
 * <<ml-nlp-search-compare>>
 
-To delve deeper into Elastic's {ml} research and development, eplore the
+To delve deeper into Elastic's {ml} research and development, explore the
 https://www.elastic.co/search-labs/blog/categories/ml-research[ML research]
 section within Search Labs.