[5.1.x] Bumped version for 5.1.6 release.

django/__init__.py

@@ -1,6 +1,6 @@
 from django.utils.version import get_version
 
-VERSION = (5, 1, 6, "alpha", 0)
+VERSION = (5, 1, 6, "final", 0)
 
 __version__ = get_version(VERSION)