Update ObsEquOracle_credential_installation.py: switch from python3.8 to python3

Privacy_Properties/ObsEquOracle_credential_installation.py

-#!/usr/bin/python3.8
+#!/usr/bin/python3
 
 import re
 # import os
@@ -83,4 +83,4 @@ for listGoals in reversed(rank):
     print(goal)
     exit(0)
 
-# exit(0)
\ No newline at end of file
+# exit(0)