consolidate to lower

pkg/engine/ahocorasick/ahocorasickcore.go

@@ -67,8 +67,7 @@ func NewAhoCorasickCore(allDetectors []detectors.Detector) *AhoCorasickCore {
 // provided input. This method populates an existing map rather than allocating a new one because
 // it will be called once per chunk and that many allocations has a noticeable performance cost.
 func (ac *AhoCorasickCore) PopulateMatchingDetectors(chunkData string, dts map[DetectorKey]detectors.Detector) []detectors.Detector {
-	lowerChunkData := strings.ToLower(chunkData)
-	matches := ac.prefilter.MatchString(lowerChunkData)
+	matches := ac.prefilter.MatchString(strings.ToLower(chunkData))
 
 	// Use a map to avoid adding duplicate detectors to the slice.
 	addedDetectors := make(map[DetectorKey]struct{})