Docs: Use correct field name in Field Value factor docs. (#26104)

docs/reference/query-dsl/function-score-query.asciidoc

@@ -253,7 +253,7 @@ influence the score. It's similar to using the `script_score` function, however,
 it avoids the overhead of scripting. If used on a multi-valued field, only the
 first value of the field is used in calculations.
 
-As an example, imagine you have a document indexed with a numeric `popularity`
+As an example, imagine you have a document indexed with a numeric `likes`
 field and wish to influence the score of a document with this field, an example
 doing so would look like: