update version to 5.7.1

Author: tibbi

Diff for: app/build.gradle

@@ -15,8 +15,8 @@ android {
         applicationId "com.simplemobiletools.voicerecorder"
         minSdkVersion 21
         targetSdkVersion 31
-        versionCode 20
-        versionName "5.7.0"
+        versionCode 22
+        versionName "5.7.1"
         setProperty("archivesBaseName", "voice-recorder")
         vectorDrawables.useSupportLibrary = true
     }