Update to use latest version of io_bazel_rules_appengine.
Update to use latest version of io_bazel_rules_appengine.

PiperOrigin-RevId: 241963227
Change-Id: I222e5acc663984f0b6b22aa9a0fd86661c47ee49

google/upvote_py2,google/upvote_py2,google/upvote_py2,google/upvote_py2