build(deps): bump google.golang.org/grpc in /tools/invoker #1126

Job	Run time
Build and push all images (auth-go)	1m 29s
Build and push all images (auth-python)	1m 11s
Build and push all images (auth-nodejs)	1m 33s
Build and push all images (auth-python-lambda)	1m 40s
Build and push all images (auth-nodejs-lambda)	1m 38s
Build and push all images (auth-go-lambda)	1m 18s
Test Knative Deployment (auth-go)	2m 17s
Test Knative Deployment (auth-python)	2m 8s
Test AWS Lambda Deployment (auth-python-lambda)	1m 8s
Test Knative Deployment (auth-nodejs)	2m 16s
Test Docker Compose (auth-go)	1m 12s
Test AWS Lambda Deployment (auth-nodejs-lambda)	1m 7s
Test Knative Deployment (auth-go-tracing)	1m 58s
Test Docker Compose (auth-python)	1m 16s
Test AWS Lambda Deployment (auth-go-lambda)	1m 8s
Test Knative Deployment (auth-python-tracing)	2m 13s
Test Docker Compose (auth-nodejs)	1m 20s
Test Knative Deployment (auth-nodejs-tracing)	2m 14s
Test Docker Compose (auth-go-tracing)	1m 14s
Test Docker Compose (auth-python-tracing)	1m 13s
Test Docker Compose (auth-nodejs-tracing)	1m 18s
	32m 51s

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