build(deps): bump golang.org/x/net in /tools/invoker/proto #1008

Job	Run time
Build and push all images (auth-go)	1m 35s
Build and push all images (auth-python)	1m 8s
Build and push all images (auth-nodejs)	1m 21s
Build and push all images (auth-python-lambda)	1m 18s
Build and push all images (auth-nodejs-lambda)	1m 46s
Build and push all images (auth-go-lambda)	1m 18s
Test AWS Lambda Deployment (auth-python-lambda)	1m 11s
Test Knative Deployment (auth-go)	2m 9s
Test AWS Lambda Deployment (auth-nodejs-lambda)	1m 8s
Test Docker Compose (auth-go)	1m 15s
Test Knative Deployment (auth-python)	2m 9s
Test AWS Lambda Deployment (auth-go-lambda)	1m 8s
Test Docker Compose (auth-python)	1m 11s
Test Knative Deployment (auth-nodejs)	2m 13s
Test Docker Compose (auth-nodejs)	1m 20s
Test Knative Deployment (auth-go-tracing)	1m 51s
Test Docker Compose (auth-go-tracing)	1m 9s
Test Knative Deployment (auth-python-tracing)	2m 15s
Test Docker Compose (auth-python-tracing)	1m 12s
Test Knative Deployment (auth-nodejs-tracing)	2m 14s
Test Docker Compose (auth-nodejs-tracing)	1m 16s
	32m 7s

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