Bump versionCode. (#5051)

Author: cooltey

app/build.gradle

@@ -37,7 +37,7 @@ android {
         applicationId 'org.wikipedia'
         minSdk 21
         targetSdk 34
-        versionCode 50506
+        versionCode 50507
         testApplicationId 'org.wikipedia.test'
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         testInstrumentationRunnerArguments clearPackageData: 'true'