unifi7: 7.3.76 -> 7.3.83

pkgs/servers/unifi/default.nix

···
   };
 
   unifi7 = generic {
-    version = "7.3.76";
-    sha256 = "sha256-/g/gCAhCT+8eyYDiIkF8WnTIWgEzneiAYHXj1pYj/dA=";
+    version = "7.3.83";
+    sha256 = "sha256-mDbF9vfoWjvABxcOIRngStji7xBllgZfUhVA9kF6ERU=";
   };
 }