update version to 5.9.1

Author: tibbi

Diff for: app/build.gradle

@@ -15,8 +15,8 @@ android {
         applicationId "com.simplemobiletools.voicerecorder"
         minSdkVersion 21
         targetSdkVersion 31
-        versionCode 26
-        versionName "5.9.0"
+        versionCode 27
+        versionName "5.9.1"
         setProperty("archivesBaseName", "voice-recorder")
         vectorDrawables.useSupportLibrary = true
     }