update googleapis SHA used for golden files

[parthea]

We should use a newer commit for googleapis/googleapis in the repositories.bzl file below:

google-cloud-python/packages/gapic-generator/repositories.bzl

Lines 76 to 82 in 4e535d2

	_commit_sha = "fae3e6e091418d6343902debaf545cfc8f32c3ff"
	_maybe(
	http_archive,
	name = "com_google_googleapis",
	strip_prefix = "googleapis-{}".format(_commit_sha),
	urls = ["https://github.com/googleapis/googleapis/archive/{}.zip".format(_commit_sha)],
	)

This is needed to update the CI environment to run tests against newer versions of protos for the 'golden' APIs