Fix usetty keyword in example ansible.cfg (#51084)

examples/ansible.cfg

@@ -420,7 +420,7 @@
 
 # The -tt argument is passed to ssh when pipelining is not enabled because sudo 
 # requires a tty by default. 
-#use_tty = True
+#usetty = True
 
 # Number of times to retry an SSH connection to a host, in case of UNREACHABLE.
 # For each retry attempt, there is an exponential backoff,