Bumped version to 2.23.0alpha6

Author: mikehardy

AnkiDroid/build.gradle

@@ -86,8 +86,8 @@ android {
         //
         // This ensures the correct ordering between the various types of releases (dev < alpha < beta < release) which is
         // needed for upgrades to be offered correctly.
-        versionCode=22300105
-        versionName="2.23.0alpha5"
+        versionCode=22300106
+        versionName="2.23.0alpha6"
         minSdk = libs.versions.minSdk.get().toInteger()
 
         // After #13695: change .tests_emulator.yml