fix typho

Change-Id: I9a072f797b2b3ec71cc6cb8c74c190ecdd86b968
diff --git a/cloud-deploy-pipeline.groovy b/cloud-deploy-pipeline.groovy
index ec4c21b..623a45d 100644
--- a/cloud-deploy-pipeline.groovy
+++ b/cloud-deploy-pipeline.groovy
@@ -227,7 +227,7 @@
                         def scaling_group = aws.getOutputs(venv_path, env_vars, STACK_NAME, 'ComputesScalingGroup')
 
                         //update autoscaling group
-                        aws.updateAutoscalingGroup(venv_path, evn_vars, scaling_group, ["--desired-capacity " + STACK_COMPUTE_COUNT])
+                        aws.updateAutoscalingGroup(venv_path, env_vars, scaling_group, ["--desired-capacity " + STACK_COMPUTE_COUNT])
 
                         // wait for computes to boot up
                         sleep(120)