Fix typo

Author: charlotte-hoblik

docs/reference/release-notes/highlights.asciidoc

@@ -136,7 +136,6 @@ POST _query
 * Fix IndexSortSortedNumericDocValuesRangeQuery for integer sorting
 * ValueSource.fromDoubleValuesSource(dvs).getSortField() would throw errors when used if the DoubleValuesSource needed scores
 * Disable connectedComponents logic in HNSW graph building.
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 {es-pull}129555[#129555]