add babbage fork

Author: disassembler

cardano-lib/private-config.nix

@@ -30,6 +30,7 @@
   TestAllegraHardForkAtEpoch = 0;
   TestAlonzoHardForkAtEpoch = 0;
   TestMaryHardForkAtEpoch = 0;
+  TestBabbageHardForkAtEpoch = 0;
 
   ##### Update system Parameters #####
   LastKnownBlockVersion-Major = 3;