build: Bump version to 1.6.4

Author: UmerCodez

app/build.gradle.kts

@@ -16,8 +16,8 @@ android {
         applicationId = "com.github.umercodez.sensorspot"
         minSdk = 21
         targetSdk = 36
-        versionCode = 15
-        versionName = "1.6.3"
+        versionCode = 16
+        versionName = "1.6.4"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }