bisect: replace a missing method on the list primitive stable

bisect: replace a missing method on the list primitive

Caught by pytype:

    File "/mnt/c/Users/Matt/hg/mercurial/commands.py", line 1095, in bisect: No attribute 'last' on list [attribute-error]
      In list

Differential Revision: https://phab.mercurial-scm.org/D10201

--- a/mercurial/commands.py	Thu Mar 11 21:09:55 2021 -0500
+++ b/mercurial/commands.py	Fri Mar 12 17:59:02 2021 -0500
@@ -1083,7 +1083,7 @@
         if rev:
             if not nodes:
                 raise error.Abort(_(b'empty revision set'))
-            node = repo[nodes.last()].node()
+            node = repo[nodes[-1]].node()
         with hbisect.restore_state(repo, state, node):
             while changesets:
                 # update state