Fix typo

README.md

@@ -412,7 +412,7 @@ Run Comparison: <a href="https://raw.githack.com/nextapps-de/flexsearch/master/t
 
 > __Note:__ This feature is actually not enabled by default. Read <a href="#contextual_enable">here</a> how to enable.
 
-FlexSearch introduce a new scoring mechanism called __Contextual Search__ which was invented by <a href="https://github.com/ts-thomas" target="_blank">Thomas Wilkerling</a>, the author of this library. A Contextual Search <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/benchmark.html" target="_blank">incredibly boost up queries to a complete new level</a> but also requires some additionally memory (depending on ___depth___).
+FlexSearch introduce a new scoring mechanism called __Contextual Search__ which was invented by <a href="https://github.com/ts-thomas" target="_blank">Thomas Wilkerling</a>, the author of this library. A Contextual Search <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/benchmark.html" target="_blank">incredibly boost up queries to a complete new level</a> but also requires some additional memory (depending on ___depth___).
 The basic idea of this concept is to limit relevance by its context instead of calculating relevance through the whole (unlimited) distance.<!--Imagine you add a text block of some sentences to an index ID. Assuming the query includes a combination of first and last word from this text block, are they really relevant to each other?-->
 In this way contextual search also <a href="https://raw.githack.com/nextapps-de/flexsearch/master/test/matching.html" target="_blank">improves the results of relevance-based queries</a> on a large amount of text data.