Functions: clarify cloudbuild.yaml (#2946)

cc @labtopia @saturnism

Author: Ace Nassri

functions/ci_cd/cloudbuild.yaml

@@ -16,8 +16,8 @@
 steps:
 - name: 'gcr.io/cloud-builders/mvn'
   args: ['clean', 'verify']
-  dir: 'functions/autodeploy'
+  dir: 'function/dir/from/repo/root'
 - name: 'gcr.io/cloud-builders/gcloud'
-  args: ['functions', 'deploy', '[YOUR_DEPLOYED_FUNCTION_NAME]', '[YOUR_FUNCTION_TRIGGER]', '--runtime', '[YOUR_RUNTIME]', '--entry-point', '[YOUR_FUNCTION_NAME_IN_CODE]']
-  dir: 'functions/autodeploy'
+  args: ['functions', 'deploy', '[YOUR_DEPLOYED_FUNCTION_NAME]', '[YOUR_FUNCTION_TRIGGER]', '--runtime', 'java11', '--entry-point', '[YOUR_FUNCTION_NAME_IN_CODE]']
+  dir: 'function/dir/from/repo/root'
 # [END functions_ci_cd_cloud_build]