chore(deps): update dependency google-api-python-client to v2.40.0 (#1720)

diff --git a/samples/compute/requirements.txt b/samples/compute/requirements.txt
index 616dfb2..775df38 100644
--- a/samples/compute/requirements.txt
+++ b/samples/compute/requirements.txt
@@ -1,3 +1,3 @@
-google-api-python-client==2.39.0
+google-api-python-client==2.40.0
 google-auth==2.6.0
 google-auth-httplib2==0.1.0