docs: add Google Cloud Samples browser link to readme template (#2649)
docs: add Google Cloud Samples browser link to readme template (#2649)

Adding a generic Google Code Sample link to the readme template.
This is for the benefit of the users, in navigating available Google Cloud code samples.
GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples