Detector-Competition-Fix - fixed the alchemy detector regex (#1821)

* fixed the alchemy detector

* added the chunk filtering for alcht_

pkg/detectors/alchemy/alchemy.go

@@ -23,13 +23,13 @@ var _ detectors.Detector = (*Scanner)(nil)
 var (
 	defaultClient = common.SaneHttpClient()
 	// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
-	keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"alchemy"}) + `\b([a-zA-Z0-9]{23}_[a-zA-Z0-9]{8})\b`)
+	keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"alchemy"}) + `\b([0-9a-zA-Z_]{32}|alcht_[0-9a-zA-Z]{30})\b`)
 )
 
 // Keywords are used for efficiently pre-filtering chunks.
 // Use identifiers in the secret preferably, or the provider name.
 func (s Scanner) Keywords() []string {
-	return []string{"alchemy"}
+	return []string{"alchemy","alcht_"}
 }
 
 // FromData will find and optionally verify Alchemy secrets in a given set of bytes.