replace "if" with "switch" in JA3 and NJA3 code

For clarity.

clienthello/fingerprint.go

@@ -48,11 +48,12 @@ func (m *ClientHelloMsg) ja3() {
 	}
 	for _, e := range m.Extensions {
 		codeGroups[2] += deGREASE16(e.Code, "")
-		if e.Code == extensionSupportedGroups {
+		switch e.Code {
+		case extensionSupportedGroups:
 			for _, g := range e.Data.SupportedGroups {
 				codeGroups[3] += deGREASE16(g.(uint16), "")
 			}
-		} else if e.Code == extensionSupportedPointFormats {
+		case extensionSupportedPointFormats:
 			for _, pf := range e.Data.SupportedPointFormats {
 				codeGroups[4] += toString(pf.(uint8)) + "-"
 			}
@@ -95,27 +96,28 @@ func (m *ClientHelloMsg) nja3() {
 			e.Code = genericGREASECode16
 		}
 		extCodes = append(extCodes, e.Code)
-		if e.Code == extensionSupportedGroups {
+		switch e.Code {
+		case extensionSupportedGroups:
 			for _, g := range e.Data.SupportedGroups {
 				codeGroups[4] += deGREASE16(g.(uint16), genericGreaseString16)
 			}
-		} else if e.Code == extensionSupportedPointFormats {
+		case extensionSupportedPointFormats:
 			for _, pf := range e.Data.SupportedPointFormats {
 				codeGroups[5] += toString(pf.(uint8)) + "-"
 			}
-		} else if e.Code == extensionSupportedVersions {
+		case extensionSupportedVersions:
 			for _, v := range e.Data.SupportedVersions {
 				codeGroups[6] += deGREASE16(v.(uint16), genericGreaseString16)
 			}
-		} else if e.Code == extensionSignatureAlgorithms {
+		case extensionSignatureAlgorithms:
 			for _, sa := range e.Data.SupportedSignatureAlgorithms {
 				codeGroups[7] += deGREASE16(sa.(uint16), genericGreaseString16)
 			}
-		} else if e.Code == extensionPSKModes {
+		case extensionPSKModes:
 			for _, mode := range e.Data.PSKModes {
 				codeGroups[8] += deGREASE8(mode.(uint8), genericGreaseString8)
 			}
-		} else if e.Code == extensionCompressCertificate {
+		case extensionCompressCertificate:
 			for _, algo := range e.Data.CertificateCompressionAlgos {
 				codeGroups[9] += toString(algo.(uint16)) + "-"
 			}